Merge branch 'master' into omnibus

CODE_OF_CONDUCT-es.md

+# Código de conducta del colaborador
+
+Como contribuyentes y mantenedores de este proyecto, y con el interés de fomentar una comunidad abierta y acogedora, nos comprometemos a respetar a todas las personas que contribuyen mediante la denuncia de problemas, publicar solicitudes o propuestas de características, actualizar documentación, enviar pull request o parches, y otras actividades.
+
+Estamos comprometidos a hacer de la participación en este proyecto una experiencia libre de acoso para todos, independientemente del nivel de experiencia, género, identidad y expresión de género, orientación sexual, discapacidad, apariencia personal, tamaño corporal, raza, etnia, edad, religión o nacionalidad.
+
+Ejemplos de comportamiento inaceptables por parte de los participantes incluyen:
+
+* Acoso público o privado
+* Ataques personales
+* Comentarios insultantes o despectivos
+* El uso de lenguaje o imágenes sexuales
+* Otras conductas poco éticas o poco profesionales
+* Publicar información privada de otros, como direcciones físicas o electrónicas, sin permiso explícito
+
+
+Los encargados del mantenimiento del proyecto tienen el derecho y la responsabilidad de eliminar, editar o rechazar comentarios, confirmaciones de cambio, código, ediciones wiki, problemas y otras contribuciones que no están alineadas con este Código de Conducta, o para prohibir temporalmente o de forma permanente cualquier colaborador por otros comportamientos que considere inapropiados, amenazante, ofensivo o dañino.
+
+Al adoptar este Código de Conducta, los encargados del mantenimiento del proyecto se comprometen a aplicar de manera justa y coherente estos principios a todos los aspectos de la gestión este proyecto. Los mantenedores de proyectos que no siguen o hacen cumplir el Código de La conducta puede eliminarse permanentemente del equipo del proyecto.
+
+Este código de conducta se aplica tanto dentro de los espacios del proyecto como en los espacios públicos. cuando un individuo representa el proyecto o su comunidad.
+
+Los casos de comportamiento abusivo, acosador o inaceptable pueden ser informado poniéndose en contacto con un responsable del proyecto en victorfelder en gmail.com. Todas las quejas serán revisadas e investigadas y resultarán en una respuesta que se considere necesaria y apropiada a las circunstancias. Los mantenedores están obligados a mantener la confidencialidad con respecto al informante de un incidente.
+
+Este Código de Conducta está adaptado del [Pacto de Colaboradores][homepage],versión 1.3.0, disponible en [https://contributor-covenant.org/version/1/3/0/]
+

HOWTO.md

@@ -3,6 +3,7 @@ Read this in other languages:[简体中文](HOWTO-zh.md), [हिन्दी](H
 Welcome to Free-Programming-Books! We welcome new contributors; even those making their very first pull request on Github. If you're one of those, here are some resources that might help:
 
 * [About Pull Requests](https://help.github.com/articles/about-pull-requests/)
+* [Creating a pull request](https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request)
 * [Github Hello World](https://guides.github.com/activities/hello-world/)
 * [Youtube - Github Tutorial For Beginners](https://www.youtube.com/watch?v=0fKg7e37bQE)
 * [Youtube - How To Fork A GitHub Repo and Submit A Pull Request](https://www.youtube.com/watch?v=G1I3HF4YWEw)

README.md

@@ -116,6 +116,7 @@ Free Podcasts and Screencasts:
 + [Russian / Русский язык](free-podcasts-screencasts-ru.md)
 + [Spanish / español / castellano](free-podcasts-screencasts-es.md)
 + [Swedish / Svenska](free-podcasts-screencasts-se.md)
++ [Turkish / Türkçe](free-podcasts-screencasts-tr.md)
 
 
 ### Programming Playgrounds

free-courses-en.md

@@ -19,6 +19,7 @@
   * [SQL](#sql)
 * [Deep Learning](#deep-learning)
 * [Docker](#docker)
+* [Flutter](#flutter)
 * [Game Development](#game-development)
 * [Git](#git)
 * [Go](#go)
@@ -28,6 +29,7 @@
 * [Java](#java)
 * [JavaScript](#javascript)
   * [Angular.js](#angularjs)
+  * [D3.js](#d3js)
   * [DenoJS](#denojs)
   * [jQuery](#jquery)
   * [Next.js](#nextjs)
@@ -267,6 +269,13 @@
 * [Learn Docker, Container Runtimes, Builders and Registries](https://www.katacoda.com/courses/container-runtimes) - Katacoda
 
 
+### Flutter
+
+* [Flutter Crash Course](https://fluttercrashcourse.com/courses/basics/lessons/materialapp-scaffold-appbar-text) - Nick Manning *(account required)*
+* [Flutter Tutorial](https://www.udacity.com/course/build-native-mobile-apps-with-flutter--ud905) - Matt Sullivan, James Williams, Mary Xia (Udacity)
+* [Flutter Tutorial for Beginners](https://www.udemy.com/course/learn-flutter-beginners-course) - Mayuresh Wankhede (Udemy)
+
+
 ### Game Development
 
 * [CS50 2019 - Games Track](https://www.youtube.com/playlist?list=PLhQjrBD2T382mHvZB-hSYWvoLzYQzT_Pb) - David J. Malan (Harvard OpenCourseWare)
@@ -318,6 +327,7 @@
 * [CSS Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWqMH9a9DY8LFKrJ5NJCFHHe)
 * [CSS3 tutorial for beginners | Learn CSS3](https://www.udemy.com/course/css3-tutorial-for-beginners-learn-css3/) - Udemy
 * [Flexbox in 30 Days](https://github.com/samanthaming/Flexbox30) - Samantha Ming
+* [HTML & CSS Crash Course](https://www.youtube.com/playlist?list=PL4cUxeGkcC9ivBf_eKCPIAYXWzLlPAm6G) - The Net Ninja (Shaun Pelling)
 * [HTML and CSS Crash Course](https://scrimba.com/learn/htmlcss) - Kevin Powell (scrimba)
 * [HTML Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWr_FB-hVEgEGUESZL1TOiJ6)
 * [Learn how to program: CSS](https://www.learnhowtoprogram.com/css) - Epicodus Inc.
@@ -336,6 +346,7 @@
 * [CS50 2019 - iOS Track](https://www.youtube.com/playlist?list=PLhQjrBD2T3810ZX79Xrgj8X382QaWbk_J) - David J. Malan (Harvard OpenCourseWare)
 * [Developing iOS 11 Apps with Swift](https://itunes.apple.com/us/course/developing-ios-11-apps-with-swift/id1309275316)
 * [Ray Wenderlich iOS Tutorial](https://www.raywenderlich.com/category/ios)
+* [The Complete Swift iOS Developer - Create Real Apps in Swift](https://www.udemy.com/course/the-complete-ios-10-developer-course/) - Grant Klimaytys (Udemy)
 
 
 ### Java
@@ -343,6 +354,7 @@
 * [Central Connecticut State University, Introduction to CS Using Java](http://chortle.ccsu.edu/CS151/cs151java.html)
 * [CS106A - Programming Methodology](https://see.stanford.edu/Course/CS106A) - (Stanford)
 * [Introduction to Java](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-092-introduction-to-programming-in-java-january-iap-2010/)
+* [Java Design Patterns and Architecture](https://www.udemy.com/course/java-design-patterns-tutorial) - John Purcell (Udemy)
 * [Java for Complete Beginners](http://courses.caveofprogramming.com/courses/java-for-complete-beginners)
 * [Java for Mobile Devices - Introducing Codename One](https://codenameone.teachable.com/p/java-for-mobile-devices-introducing-codename-one)
 * [Java Online Training | Edureka](https://www.youtube.com/watch?v=hBh_CC5y8-s) - (Edureka)
@@ -380,9 +392,15 @@
 * [Shaping up with Angular.js](https://www.codeschool.com/courses/shaping-up-with-angular-js)
 
 
+### D3.js
+
+* [D3 101](https://www.youtube.com/playlist?list=PL9yYRbwpkykvjkfuRslECO9c1qTq3GgUb) - Curran Kelleher
+* [Learn D3](https://www.codecademy.com/learn/learn-d3) - Codecademy *(account required)*
+
+
 #### DenoJS
 
-* [Deno Beginner](https://denobeginner.com) - Ahmad Awais - _Email required_
+* [Deno Beginner](https://denobeginner.com) - Ahmad Awais - *(email required)*
 
 
 #### jQuery
@@ -521,6 +539,7 @@
 * [Berkeley's CS 194: What is an Operating System?](http://www.infocobuild.com/education/audio-video-courses/computer-science/cs194-spring2013-berkeley.html)
 * [Bits: The Computer Science of Digital Information](http://www.extension.harvard.edu/open-learning-initiative/bits)
 * [Caltech's Learning From data](https://work.caltech.edu/telecourse.html)
+* [Cloud Computing and Development](https://uaceit.com/courses/cloud-computing-and-development) - Ashwin Kumar Ramaswamy (UAceIt)
 * [Computer Graphics](http://nptel.ac.in/courses/106106090/)
 * [Elements of AI](https://www.elementsofai.com)
 * [Embedded Software Safety](https://www.youtube.com/playlist?list=PLAQopGWlIcyaqDBW1zSKx7lHfVcOmWSWt) (P. Koopman)
@@ -578,6 +597,7 @@
 * [Bento Python Learning Track](https://bento.io/topic/python) (Bento)
 * [Berkeley's Structure and Interpretation of Computer Programs](http://cs61a.org)
 * [Codesdope](https://www.codesdope.com/python-introduction)
+* [Fork Python](https://practice.geeksforgeeks.org/courses/fork-python) (GeeksForGeeks)
 * [Google's Python Course](https://developers.google.com/edu/python/)
 * [Introduction to Computer Science and Programming](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00sc-introduction-to-computer-science-and-programming-spring-2011/) (MIT's opencourseware)
 * [Introduction to Programming Using Python](https://www.edx.org/course/introduction-to-programming-using-python) (edX)
@@ -612,6 +632,7 @@
 #### Django
 
 * [Django for Everybody](https://dj4e.sites.uofmhosting.net/lessons) (Coursera Reading Materials with YouTube Videos)
+* [Django Tutorial for Beginners](https://www.youtube.com/playlist?list=PLsyeobzWxl7r2ukVgTqIQcl-1T0C2mzau) - Navin Reddy
 * [Django Tutorials](https://www.youtube.com/playlist?list=PL-osiE80TeTtoQCKZ03TU5fNfx2UY6U4p) - Corey Schafer
 
 

free-courses-es.md

@@ -107,6 +107,7 @@
 * [Curso Django](https://www.pildorasinformaticas.es/course/django) - Juan Díaz (Píldoras Informáticas)
 * [Curso Spring](https://www.pildorasinformaticas.es/course/curso-spring) - Juan Díaz (Píldoras Informáticas)
 * [Laravel](https://www.pildorasinformaticas.es/course/laravel) - Juan Díaz (Píldoras Informáticas)
+* [Probar Django | Crear una Aplicación Web](https://www.udemy.com/course/probar-django-construir-una-aplicacion-web-en-python) - Justin Mitchel, Karlita K (Udemy)
 
 
 ### LaTeX

free-courses-fa_IR.md

@@ -43,6 +43,7 @@
 
 ### Machine Learning
 
+* [درس یادگیری ماشین دانشگاه استنفورد](https://maktabkhooneh.org/course/35-%DB%8C%D8%A7%D8%AF%DA%AF%DB%8C%D8%B1%DB%8C-%D9%85%D8%A7%D8%B4%DB%8C%D9%86-mk35) - Andrew Ng
 * [درس یادگیری ماشین دانشگاه صنعتی شریف](https://maktabkhooneh.org/course/273-%DB%8C%D8%A7%D8%AF%DA%AF%DB%8C%D8%B1%DB%8C-%D9%85%D8%A7%D8%B4%DB%8C%D9%86-mk273) - Mahdiyeh Soleymani
 
 

free-courses-hi.md

@@ -14,17 +14,20 @@
 ### Android
 
 * [Android Development Tutorials in Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9aiL0kysYlfSOUgY5rNlOhUd) - Harry
+* [Complete Android Development Course in Hindi](https://www.youtube.com/playlist?list=PLUhfM8afLE_Ok-0Lx2v9hfrmbxi3GgsX1) - Neat Roots
 
 
 ### C
 
 * [All C Concepts | Hindi](https://www.youtube.com/playlist?list=PL7ersPsTyYt1d8g5qaxbE6sjWDzs4D_1v) - Saurabh Shukla
+* [C Language Tutorial In Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9aiXlHcLx-mDH1Qul38wD3aR) - CodeWithHarry
 
 
 ### C++
 
-* [The Complete C++ Course | Hindi](https://www.youtube.com/playlist?list=PLLYz8uHU480j37APNXBdPz7YzAi4XlQUF) - Saurabh Shukla
 * [C++ Full Course | C++ Tutorial | Data Structures & Algorithms](https://www.youtube.com/playlist?list=PLfqMhTWNBTe0b2nM6JHVCnAkhQRGiZMSJ) - Apna College
+* [C++ Programming in Hindi](https://www.youtube.com/playlist?list=PLDA2q3s0-n15yszaZ2yRKEoxY-WWkuAt4) - Sumit Bisht (Edutainment 1.0)
+* [The Complete C++ Course | Hindi](https://www.youtube.com/playlist?list=PLLYz8uHU480j37APNXBdPz7YzAi4XlQUF) - Saurabh Shukla
 
 
 ### Data Structures
@@ -32,6 +35,7 @@
 * [All Data Structure Concepts | Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefJNztGGoQC-59UhSwIaiIW3) - Saurabh Shukla
 * [All Sorting algorithms and Programs | Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefJU-Sj__mljvrmJHZVKWbEm) - Saurabh Shukla
 * [Data Structure Programs | Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefK_DAUwnQwBizOmcY7aDLoY) - Saurabh Shukla
+* [Data Structures and Algorithms Course in Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9ahIappRPN0MCAgtOu3lQjQi) - CodeWithHarry
 
 
 ### Java
@@ -47,6 +51,7 @@
 
 ### Python
 
+* [Class 12 Board | Python | Computer Science](https://www.youtube.com/playlist?list=PLKKfKV1b9e8oyESqu5mrGN-eDxHdNoi_j) - Apni Kaksha
 * [Python Programming in Hindi](https://www.greatlearning.in/academy/learn-for-free/courses/python-programming-in-hindi) (Great Learning) *(account required)*
 * [Python Tutorial For Beginners | Hindi (With Notes)](https://www.youtube.com/playlist?list=PLu0W_9lII9agICnT8t4iYVSZ3eykIAOME) - Harry
 

free-courses-pl.md

@@ -13,6 +13,7 @@
 * [MySQL](#mysql)
 * [PHP](#php)
 * [Python](#python)
+* [Swift](#swift)
 
 
 ### Assembly Language
@@ -101,3 +102,10 @@
 * [Kurs Python - Darmowy Po Polsku](https://www.youtube.com/playlist?list=PL_dDQ_G9rdI6dQsDkwqSQyAeXY3uUrWzp)
 * [Kurs Python 3](https://www.youtube.com/playlist?list=PLdBHMlEKo8UcOaykMssI1_X6ui0tzTNoH)
 * [Python 3 - Kurs wideo](https://www.youtube.com/playlist?list=PLbOPmSDkHx2pCboufcEKkinpUuramshmr)
+
+
+### Swift
+
+* [Kurs Swift - Lekcja 0: Zakładamy konto deweloperskie i pobieramy Xcode](https://myapple.pl/posts/8599-kurs-swift-lekcja-0-zakladamy-konto-deweloperskie-i-pobieramy-xcode) - Michał Lipiński
+* [Kurs Swift - Lekcja 1: Podstawy języka](https://myapple.pl/posts/8600-kurs-swift-lekcja-1-podstawy-jezyka) - Michał Lipiński
+* [Kurs Swift - Lekcja 2: Jak zbudowane są aplikacje](https://myapple.pl/posts/8601-kurs-swift-lekcja-2-jak-zbudowane-sa-aplikacje) - Michał Lipiński

free-courses-tr.md

 ### Index
 
 * [Algoritmalar](#algoritmalar)
+* [CSS](#css)
 * [Temel programlama](#temel-programlama)
 
 
@@ -9,6 +10,11 @@
 * [Algoritmalara giriş](https://acikders.tuba.gov.tr/course/view.php?id=133) - Charles Leiserson / Erik Demaine (Çev. Ali Yazıcı - Haluk Ar)
 
 
+### CSS
+
+* [Sıfırdan CSS Eğitim](https://www.youtube.com/playlist?list=PLadt0EaV4m3BX9JaZbKS9B8076bruv93Y) - Adem Ilter
+
+
 ### Temel programlama
 
 * [Bilgisayar programlama I](https://acikders.ankara.edu.tr/course/view.php?id=8750) - Semra Gündüç

free-podcasts-screencasts-en.md

@@ -290,6 +290,7 @@
 ### Python
 
 * [Build applications in Python the antitextbook](https://www.youtube.com/playlist?list=PL41psiCma00wwvtQyLFMFpzWxUYmSZwZy) (screencast)
+* [Codecasts](https://www.youtube.com/playlist?list=PL_qGav8csvade05RSAYtnxvCfQKTJcZR4) - Daniel Feldroy (screencast)
 * [Diving into Django](http://code.tutsplus.com/articles/diving-into-django--net-2969) (screencast)
 * [Import this](https://soundcloud.com/import-this) (podcast)
 * [Podcast.__init__](http://podcastinit.com) (podcast)

free-podcasts-screencasts-tr.md

+### Index
+
+* [JavaScript](#javascript)
+
+
+### JavaScript
+
+* [null podcast](https://soundcloud.com/nullpodcast) (podcast)

free-programming-books-es.md

@@ -179,6 +179,7 @@
 * [CSS avanzado](http://librosweb.es/libro/css_avanzado) Javier Eguíluz (HTML) [(PDF)](https://openlibra.com/es/book/download/css-avanzado)
 * [CSS3 y JavaScript avanzado](https://openlibra.com/es/book/download/css3-y-javascript-avanzado) (PDF)
 * [Diseño de Interfaces Web](http://interfacesweb.github.io/unidades/) (HTML)
+* [El gran libro del diseño web](https://freeditorial.com/es/books/el-gran-libro-del-diseno-web) - Rither Cobeña C [(PDF, EPUB)]
 * [Estructura con CSS](http://es.learnlayout.com) (HTML)
 * [Guía Completa de CSS3](https://openlibra.com/es/book/download/guia-completa-de-css3) - Antonio Navajas (PDF)
 * [HTML5](https://openlibra.com/es/book/html5) - Arkaitz Garro (PDF)

free-programming-books-fa_IR.md

@@ -66,3 +66,4 @@
 ### مهندسی نرم‌افزار
 
 * [الگوهای طراحی در برنامه‌نویسی شیء‌گرا](https://github.com/khajavi/Practical-Design-Patterns)
+* [ترجمه آزاد کتاب کد تمیز](https://github.com/Noah1001000/clean-code-persian) - Robert C. Martin et al.

free-programming-books-gr.md

@@ -3,6 +3,7 @@
 * [C](#c)
 * [C++](#c++)
 * [Java](#java)
+* [Javascript](#javascript)
 * [Python](#python)
 * [Scala](#scala)
 * [SQL](#sql)
@@ -29,8 +30,14 @@
 * [Σημειώσεις Java](http://www.ebooks4greeks.gr/wp-content/uploads/2013/03/shmeiwseis-Java-eBooks4Greeks.gr_.pdf) (PDF)
 
 
+### Javascript
+
+* [HTML5-JavaScript (Δημιουργώντας παιχνίδια – Ο εύκολος τρόπος)](https://www.ebooks4greeks.gr/html5-javascript)
+
+
 ### Python
 
+* [Εισαγωγή στον Προγραμματισμό με Αρωγό τη Γλώσσα Python] (https://www.ebooks4greeks.gr/eisagwgh-ston-programmatismo-me-arwgo-th-glwssa-python)
 * [Ένα byte της Python](https://archive.org/details/AByteOfPythonEl)
 
 
@@ -41,4 +48,6 @@
 
 ### SQL
 
-* [Συστήματα Βάσεων Δεδομένων - Θεωρία και πρακτική εφαρμογή](http://studentguru.gr/cfs-file/__key/telligent-evolution-components-attachments/13-1200-00-00-00-13-46-27/vaseis_5F00_dedomenwn.pdf) (PDF)
+* [Εισαγωγή στην SQL: Εργαστηριακές Ασκήσεις σε MySQL5.7] (https://www.ebooks4greeks.gr/eisagwgh-sthn-sql-ergasthriakes-askhseis-se-mysql5-7)
+
+

free-programming-books-id.md

@@ -72,6 +72,7 @@
 ### Java
 
 * [Java Desktop](https://github.com/ifnu/buku-java-desktop/raw/master/java-desktop-ifnu-bima.pdf) - Ifnu Bima (PDF)
+* [Memulai Java Enterprise dengan Spring Boot](https://raw.githubusercontent.com/teten777/free-ebook-springboot-basic/master/Memulai%20Java%20Enterprise%20dengan%20Spring%20Boot.pdf) - Teten Nugraha (PDF)
 * [Pemrograman Java](https://blog.rosihanari.net/download-tutorial-java-se-gratis/) - Rosihan Ari Yuana
 
 

free-programming-books-pt_BR.md

@@ -147,6 +147,7 @@
 * [Desenvolvimento Web com HTML, CSS e JavaScript](https://www.caelum.com.br/apostila-html-css-javascript/) - Caelum
 * [Dive Into HTML5](http://diveintohtml5.com.br)
 * [Estruturando o HTML com CSS](http://pt-br.learnlayout.com)
+* [Websites Atendendo a Requisitos de Acessibilidade e Usabilidade](https://leanpub.com/warau) - Leonelo Dell Anhol Almeida, Maria Cecília Calani Baranauskas, Vagner Figueredo de Santana (PDF) *(Leanpub account or valid email requested)*
 
 
 ### Java

free-programming-books-tr.md

@@ -8,6 +8,7 @@
 * [Fortran](#fortran)
 * [Git](#git)
 * [Go](#go)
+* [Güvenlik ve Gizlilik](#guvenlik-ve-gizlilik)
 * [Html](#html)
 * [iOS](#ios)
 * [Java](#java)
@@ -26,8 +27,9 @@
 
 ### Android
 
-* [Android Dersleri](https://umiitkose.com/android)
+* [Android Dersleri](https://umiitkose.com/android) - Ümit Köse
 * [Android Geleceği Yazanlar](https://gelecegiyazanlar.turkcell.com.tr/konu/android)
+* [Android Türkçe PDF](http://umiitkose.com/wp-content/uploads/2015/08/AndroidStudio.pdf) - Ümit Köse (PDF)
 
 
 ### C
@@ -70,6 +72,11 @@
 * [Go El Kitabı](https://github.com/umutphp/the-little-go-book) - Karl Seguin, Umut Işık tarafından çevirildi
 
 
+### Güvenlik ve Gizlilik
+
+* [Özgür Yazılım Derneği Güvenlik Rehberi](https://guvenlik.oyd.org.tr) - Filiz Akin et al.
+
+
 ### Html
 
 * [Html'e Giriş](http://www.htmldersleri.org)

free-programming-books.md

@@ -34,6 +34,7 @@
 * [D](#d)
 * [Dart](#dart)
 * [DB2](#db2)
+* [DBMS](#dbms)
 * [Delphi / Pascal](#delphi--pascal)
 * [DTrace](#dtrace)
 * [Eiffel](#eiffel)
@@ -227,6 +228,7 @@
 * [Tizen](#tizen)
 * [TLA](#tla)
 * [TypeScript](#typescript)
+  * [Angular](#angular)
   * [Deno](#deno)
 * [Unix](#unix)
 * [Verilog](#verilog)
@@ -1255,6 +1257,11 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Getting started with IBM DB2 development](http://public.dhe.ibm.com/software/dw/db2/express-c/wiki/Getting_Started_with_DB2_App_Dev_p2.pdf) (PDF)
 
 
+### DBMS
+
+* [Database Management Systems eBooks For All Edition](http://www.lincoste.com/ebooks/english/pdf/computers/database_management_systems.pdf) (PDF)
+
+
 ### Delphi / Pascal
 
 * [Essential Pascal Version 1 and 2](http://www.marcocantu.com/epascal/) - M. Cantù
@@ -1384,6 +1391,7 @@ Kerridge (PDF) (email address *requested*, not required)
 ### Fortran
 
 * [Introduction to fortran 95 and numerical computing: a jump-start for scientists and engineers](http://people.cs.vt.edu/~asandu/Deposit/Fortran95_notes.pdf) (PDF)
+* [Professional Programmer’s Guide to Fortran77](https://www.star.le.ac.uk/~cgp/prof77.pdf) (PDF)
 * [Self Study Guide: Programming in Fortran 95](http://www.mrao.cam.ac.uk/~rachael/compphys/SelfStudyF95.pdf) (PDF)
 
 
@@ -1730,10 +1738,11 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Practical Modern JavaScript](https://github.com/mjavascript/practical-modern-javascript) - Nicolas Bevacqua (HTML)
 * [Professor Frisby’s Mostly Adequate Guide to Functional Programming](https://mostly-adequate.gitbooks.io/mostly-adequate-guide/content/) - Brian Lonsdorf (HTML)
 * [Robust Client-Side JavaScript](https://molily.de/robust-javascript/) - Matthias Schäfer (HTML, EPUB)
-* [Speaking JavaScript](http://speakingjs.com/es5/) - Dr. Axel Rauschmayer (HTML)
-* [Standard ECMA-262 ECMAScript 2016 Language Specification](https://www.ecma-international.org/publications/standards/Ecma-262.htm) - Ecma International (HTML, PDF)
+* [Single page apps in depth](http://singlepageappbook.com) - Mixu (HTML)
+* [Speaking JavaScript](http://speakingjs.com/es5/) - Dr. Axel Rauschmayer
+* [Standard ECMA-262 ECMAScript 2016 Language Specification](https://www.ecma-international.org/publications/standards/Ecma-262.htm) - Ecma International (HTML,PDF)
 * [The JavaScript Tutorial](http://javascript.info) - Ilya Kantor (HTML)
-* [The JavaScript Way](https://github.com/bpesquet/thejsway) - Baptiste Pesquet (HTML)
+* [The JavaScript Way](https://github.com/bpesquet/thejsway) - Baptiste Pesquet
 * [The Problem with Native JavaScript APIs](https://www.oreilly.com/programming/free/native-javascript-apis.csp) - Nicholas C. Zakas (PDF, email address *requested*)
 * [Thinking in JavaScript](https://www.amazon.com/Thinking-JavaScript-Aravind-Shenoy-ebook/dp/B00JUI6LUQ) - Aravind Shenoy (Kindle)
 * [Understanding ECMAScript 6](https://leanpub.com/understandinges6/read) - Nicholas C. Zakas (HTML)
@@ -1752,8 +1761,6 @@ Kerridge (PDF) (email address *requested*, not required)
 * [AngularJS Notes for Professionals](https://goalkicker.com/AngularJSBook) - Compiled from StackOverflow Documentation (PDF)
 * [AngularJS Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/angularjs) (PDF, Kindle) (email address *requested*, not required)
 * [AngularJs vs EmberJs](http://angularjs-emberjs-compare.bguiz.com)
-* [Build a Full-Stack Web Application Using Angular & Firebase](https://www.c-sharpcorner.com/ebooks/build-a-full-stack-web-application-using-angular-and-firebase) - Ankit Sharma
-* [Practical Angular: Build your first web apps with Angular 8](https://leanpub.com/practical-angular) - Ahmed Bouchefra *(Leanpub account or valid email requested)*
 * [Seven-Part Introduction to Angular](http://ngokevin.com/blog/angular-1/)
 * [Unit Testing Best Practices in AngularJS](http://andyshora.com/unit-testing-best-practices-angularjs.html)
 
@@ -2044,6 +2051,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Experiments with MATLAB](http://www.mathworks.com/moler/exm/index.html?requestedDomain=www.mathworks.com&nocookie=true)
 * [Freshman Engineering Problem Solving with MATLAB](https://cnx.org/exports/3a643c1f-c1ba-4c2a-8065-317a1f2b1add@18.1.pdf/freshman-engineering-problem-solving-with-matlab-18.1.pdf) (PDF)
 * [Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics](http://www.mathworks.com/tutorials)
+* [Introduction to MATLAB for Engineering Students](https://www.mccormick.northwestern.edu/documents/students/undergraduate/introduction-to-matlab.pdf) - David Houcque (PDF) (1.2, 2005)
 * [MATLAB - A Fundamental Tool for Scientific Computing and Engineering Applications - Volume 1](http://www.intechopen.com/books/matlab-a-fundamental-tool-for-scientific-computing-and-engineering-applications-volume-1)
 * [MATLAB - A Ubiquitous Tool for the Practical Engineer](http://www.intechopen.com/books/matlab-a-ubiquitous-tool-for-the-practical-engineer)
 * [MATLAB for Engineers: Applications in Control, Electrical Engineering, IT and Robotics](http://www.intechopen.com/books/matlab-for-engineers-applications-in-control-electrical-engineering-it-and-robotics)
@@ -2458,6 +2466,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Django Official Documentation](https://media.readthedocs.org/pdf/django/1.9.x/django.pdf) (PDF) (1.9)
 * [Django Official Documentation](https://media.readthedocs.org/pdf/django/1.10.x/django.pdf) (PDF) (1.10)
 * [Django Official Documentation](https://buildmedia.readthedocs.org/media/pdf/django/2.2.x/django.pdf) (PDF) (2.2)
+* [Django Official Documentation](https://buildmedia.readthedocs.org/media/pdf/django/3.1.x/django.pdf) (PDF) (3.1)
 * [Django RESTful Web Services](https://www.packtpub.com/free-ebooks/django-restful-web-services) - Gaston C. Hillar (Packt account *required*)
 * [Django Web Framework (Python)](https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django) - MDN contributors
 * [Djen of Django](http://agiliq.com/books/djenofdjango/)
@@ -2605,6 +2614,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Building REST APIs with Rails](http://apionrails.icalialabs.com/book)
 * [Kestrels, Quirky Birds, and Hopeless Egocentricity](https://leanpub.com/combinators/read) - Reg Braithwaite
 * [Learn Ruby on Rails as You Modify a Craigslist Clone](http://www.thinkful.com/learn/ruby-on-rails-tutorial/)
+* [Learn Ruby on Rails: Book One](https://leanpub.com/learnrubyonrails) - Daniel Kehoe (PDF, EPUB) *(Leanpub account or valid email requested)*
 * [Objects on Rails](https://web.archive.org/web/20190319201525/http://objectsonrails.com/) - Avdi Grimm
 * [Rails Girls Guides](http://guides.railsgirls.com)
 * [Ruby Notes for Professionals](https://books.goalkicker.com/RubyBook/) - Compiled from StackOverflow Documentation (PDF)
@@ -2706,6 +2716,7 @@ Kerridge (PDF) (email address *requested*, not required)
 
 * [An Introductory Computing Curriculum Using Scratch](http://scratched.gse.harvard.edu/guide/download.html)
 * [Computer Science Concepts in Scratch](https://stwww1.weizmann.ac.il/scratch/scratch_en/)
+* [Learn to Code with Scratch](https://www.raspberrypi.org/magpi-issues/Essentials_Scratch_v1.pdf) - The MagPi magazine (PDF)
 * [Scratch Programming Playground](https://inventwithscratch.com/book/) - Al Sweigart
 
 
@@ -2854,7 +2865,14 @@ Kerridge (PDF) (email address *requested*, not required)
 * [TypeScript Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/typescript) (PDF, Kindle) (email address *requested*, not required)
 
 
-### Deno
+#### Angular
+
+* [Angular 2+ Notes for Professionals](https://goalkicker.com/Angular2Book/) - Compiled from StackOverflow documentation (PDF)
+* [Angular Docs](https://angular.io/docs) 
+* [Build a Full-Stack Web Application Using Angular & Firebase](https://www.c-sharpcorner.com/ebooks/build-a-full-stack-web-application-using-angular-and-firebase) - Ankit Sharma
+
+
+#### Deno
 
 * [Deno Manual](https://deno.land/manual)
 * [FlavioCopes Deno Handbook](https://flaviocopes.com/deno) - *free PDF with registration*

free-programming-cheatsheets.md

@@ -110,8 +110,11 @@
 
 ### Python
 
+* [Comprehensive Python Cheat Sheet for Beginners](https://medium.com/the-codehub/comprehensive-python-cheat-sheet-for-beginners-5d76bb038fa2)
 * [Comprehensive Python Cheatsheet](https://gto76.github.io/python-cheatsheet) - Jure Šorn (HTML)
-* [Python Crach Course Cheatsheet](https://ehmatthes.github.io/pcc/cheatsheets/README.html) - Eric Matthes (HTML)
+* [Python Cheat Sheet](https://websitesetup.org/python-cheat-sheet/)
+* [Python Cheatsheet for beginners](https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-syntax/cheatsheet) - Codeacademy (HTML)
+* [Python Crash Course Cheatsheet](https://ehmatthes.github.io/pcc/cheatsheets/README.html) - Eric Matthes (HTML)
 * [Python for Data Science Cheatsheet](https://pydatascience.org/data-science-cheatsheets/) - DataCamp (HTML and Image)
 * [Python Regex Cheatsheet](https://www.debuggex.com/cheatsheet/regex/python) - Debuggex (HTML)
 * [Python WorldWide Cheatsheet](https://cheatography.com/davechild/cheat-sheets/python/) - Cheatography (Python)

problem-sets-competitive-programming.md

@@ -38,6 +38,7 @@
 * [Microcorruption](https://microcorruption.com/login)
 * [oj.uz](https://oj.uz)
 * [Sphere Online Judge](http://www.spoj.com/contests)
+* [Techgig](https://www.techgig.com)
 * [Topcoder](https://www.topcoder.com)
 * [Toph](https://toph.co)
 * [URI Online Judge](https://www.urionlinejudge.com.br/judge/en/login)
@@ -47,6 +48,7 @@
 
 * [CTFlearn](https://ctflearn.com) (email adress *requested*)
 * [Google Ctf](https://capturetheflag.withgoogle.com) (email adress *requested*)
+* [Hacker101](https://ctf.hacker101.com) (email adress *requested*)
 * [Hackthebox](https://www.hackthebox.eu) (email adress *requested*)
 * [Overthewire Wargames fungame to practice CTF](https://overthewire.org/wargames/bandit)
 * [Picoctf](https://picoctf.org/resources) (email adress *requested*)