* add electron book from syncfusion

* change electron category to javascript framework

* remove .idea folder

* fix error linting in electron resources

* rearrange korean course in alphabetical order

* change section according to the markdown syntax

* Add new section and book: operation system

* HTML syntax back to its original state.

* changed to direct link

* Update free-programming-playgrounds.md

Added a few C++ playgrounds to the list

* Update free-programming-playgrounds.md

Placed the links in alphabetical order. I mistakenly didn't do this in my initial PR.

* Added respective authors to the links

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

* add gtk event driven book

* update with correct book name
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Add flutter/dart courses in arabic

I added new sections for Flutter and Dart courses
provided by eng.Asem Saafan

* Add flutter/dart courses in arabic

I added new sections for Flutter and Dart courses
provided by eng.Asem Saafan

* Add flutter/dart courses in arabic

I added new sections for Flutter and Dart courses
provided by eng.Asem Saafan

* Add flutter/dart courses in arabic

I added new sections for Flutter and Dart courses
provided by eng.Asem Saafan

Co-authored-by: NAdain, Mohammed Wazir <adain@deshaw.com>

* Improve german HOWTO file by fixing some grammar and restructuring some sentences to make it easier to read and understand

* Improve german CONTRIBUTING file by fixing some grammar and fix some readability issues

* Added a non-breaking space for "z. B." to prevent automatic line break

* Restore alignment on good/bad examples with colons

* Adding Database Systems free Course

Add youtube video's URL with Database Systems - Cornell University Course (SQL, NoSQL, Large-Scale Data Analysis) subject that created by Professor Immanuel Trummer, PhD and uploaded in the  freeCodeCamp.org youtube channel

* Update courses/free-courses-en.md with better name resources and simpler attributions

Implement the advice about name resources and complex attributions.
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Adding Module Patterns

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

by Pepcoding

* Korean guide upload

* Korean guide upload

* Language link update
Co-authored-by: Nhedykim <mzchedykim@lgupluspartners.co.kr>

Enhance format CONTRIBUTING-id.md for more readable according to Git format

Adding new youtube playlist for Git Free Course from Eko Kurniawan Khannedy, Programmer Zaman Now (YouTube)

Introduction to Compilers and Language Design - Douglas Thain (PDF)

link not working, disabled

A fullwidth "G"

Adding CONTRIBUTING Indonesia version in the English version

* Update Basic Machine Learning Blog Course

Machine learn cơ bản blog by Vũ Hữu Tiệp

* Add blank line to seperate section.

* Add blank line to seperate section.

* Update courses/free-courses-vi.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NEric Hellman <eric@hellman.net>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Add OCaml From the Ground Up

* Remove trailing slash

* Add Algorithmique du texte

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

Changed from HTML/PDF links to their respective landing page so reader can choose
their preferred reading format (HTML node, HTML single page, PDF, etc.).

* Create HOWTO-id.md

* add HOWTO-id.md link

* add HOWTO-id.md link

* Update CONTRIBUTING-de.md

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* add HOWTO-id.md link

* Adds Python course from NPTEL

* fixed hyperlink bug
Co-authored-by: NAdain, Mohammed Wazir <adain@deshaw.com>

One of Udemy URL to the course is no longer accepting enrollments.

* Added course for Data Structures

* Added AI Course.

CS50’s Introduction to Artificial Intelligence with Python

* Fixed typo in course author's name.

* Updated course link to the latest version (2021)

This is CS50x

* Add in book to Data Structures section

* Moves resource to new section

Moved "The Joy of Cryptography" from the Mathematics section to the Security section

* Update resource information

Updated the date on "The Joy of Cryptography" resource

* add in cryptography resource

Co-authored-by: NPrakash <prakash_kumar-bng@external.mckinsey.com>