Contibuting on Indonesian language

* an intro course for linux beginners from jadi

* blockchain section added with a course from youtube

* network section added with a course from youtube

* persian podcast/screencast page created

* persian section added to podcasts and screencasts

* minor typo fixed for github actions

* new lines added for the linter

* typo fixed for the linter
Co-authored-by: NEmad Ehsanrad <emad.ehsanrad@gmail.com>

* Update markdown processor to use GFM

* Split markdown config into new section - Conversion

* Add Polish DS book

* Add Polish CP book

* Fix some indications

* Interactive: Add SQL Teaching

* Update  alphabetical ordering

* Add "A Primer on Design Patterns"

* add formats and notes for leanpub

* Remove direct link to book in HTML format
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update free-courses-en.md

* Update free-courses-en.md

* Add 4 course on free-courses-id.md

* fixing linter failed on courses

* add 4 course on free-courses-id.md

* remove kotlin free course on free-courses-id.md

* remove unused line on kotlin

* add 2 kotlin resources on free-courses-id.md

* fixing number of lines on end of section

* add 4 course on free-courses-id.md

* Add 4 git course on free-courses-id.md

* add credit to course instructor

Co-authored-by: Muhamad Arif Ar Rijal <>

* Update Spanish translation files

Fix some minor spelling issues.

* Update CONTRIBUTING-es.md

* Standardize Github mentions in HOWTO-es.md

* books: add 'Essentials - Conquer the Command Line

chore: typo

* chore: rename book

* CI bug

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-interactive-tutorials-en.md

* Updated a broken llink

Updated a broken link to the book "Mastering Xamarin UI Development, Second Edition" by Steven F. Daniel

* Added missing author to title

Added missing author name to the title "Creating Mobile Apps with Xamarin.Forms C#" by Charles Petzold

* Removed dead links

* Add InfoSec 

Added Introduction to Information Security Course

* Add Full Stack Course

* Update free-courses-en.md

* feat: add Web Design Primer book

* feat: change order

* feat: change category
Co-authored-by: NAlexandre VU <alexandre.vu@montreal.ca>

* Add Go tutorial

* Fix lint

* Fix lint

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

Added English, By subject to next line under Books category

* Update free-courses-es.md

* Update free-courses-es.md

* Update free-courses-es.md

* Update free-courses-es.md

* Update free-courses-es.md

* Add cht.sh Go Cheatsheet entry

- A quick tutorial/reference to learn Go.

* Add Go cheatsheet to correct place

- Add Go cht.sh entry to free-programming-cheatsheets.md
- Remove Go cht.sh entry from free-courses-en.md

* Fix blank-lines lint error

* Add Machine Learning Book

Add Machine Learning Book
- Machine Learning with Python

* Add Machine Learning Book

Add Machine Learning with Python Book

* Revise

Revise

* Add C Programming Tutorial book

* Update the link

Changed the book type (HTML)

* Reformat the link

* Update free-courses-it.md

* Update free-courses-it.md

* update "Corso di C per Sistemi Embedded"

* Update free-courses-it.md

* add The Mechanics of Machine Learning

* change url for Introduction to statistical Learning

* change url for Mining of Massive Datasets

* add Mathematics for Machine Learning course

* add Made with ML in courses

* fix position of Made with ML

* remove trailing

* fix trailing \ in programming-books-langs

* add PDF indication to MMDS book

* add author and remove author links

* Added RxJS YouTube playlist in Hindi free course

* Added RxJS YouTube playlist in English free course

* Removed RxJS sub-category and merged course with JS category

* Removed RxJS sub-category and merged course with JS category

* Kubernetes Deployment & Security Patterns added

* Put the link under Containers section

* Add section called "Roda" to Ruby's section

And add https://fiachetti.gitlab.io/mastering-roda/ Mastering Roda free book to it

* Remove Roda section & Move Mastering Roda to Ruby's

* Updated a broken llink

Updated a broken link to the book "Mastering Xamarin UI Development, Second Edition" by Steven F. Daniel

* Added missing author to title

Added missing author name to the title "Creating Mobile Apps with Xamarin.Forms C#" by Charles Petzold

* Update free-courses-en.md

* Added 2 open online courses and a book for ML

Added two open online courses in MOOC and added a book for machine learning

* Remove trailing slash 

Remove trailing slash

* Alphabetical ordering of courses

* Removed extra space

* Removed the ML book

* Added free tutorial for Javascript

* Added Learning Kotlin pdf book

* Added Learning Kotlin pdf book

* add CONTRIBUTING-de.md with German contributing guidelines.

* edit typos in CONTRIBUTING.md.

* add link to German contributing guide to language list in other contribution files, re-order list alphabetically.

* switch back the order of English and French language links in all Contribution Guidelines.

* eliminate extra spaces and put spaces in the correct positions.