* Added Next.js and "Mastering Next.js" course

* spaces

* no trailing slash

* Update free-courses-hi.md

Added Data Structures, and made some structural changes according to the guidelines.

* Update free-courses-hi.md

Updated the links in the Data Structures Topic.

* Update free-courses-hi.md

* Add tutorial rails girls

* Add Rails Girls tutorial as requested in #4484

* Updated commit as requested in #4484

* Create free-courses-th.md

* Update free-courses-th.md

edit break line

* Update free-courses-th.md

-edit line break (3 lines)
-edit 3 names of cources from marcuscode.com(C, C#, C++, Js, Py)

* Update free-courses-th.md

change (Author) to " - "

* Update free-courses-th.md

edit [ภาษา Javascript] to [ภาษา JavaScript]

* Update free-courses-th.md

alphabetize

* docs: create additional page for cheatsheets

* docs: update cheatsheets page and add link to html/css section

* docs: add empty line at the end of the file

* Add UA courses file with Python course

check_urls=free-courses-ua.md

* Add link to README; fix link

* Update free-courses-en.md

Added Flexbox & CSS Grid free video resources to the repo

* Update free-courses-en.md

* Update free-courses-en.md

Removed the trailing slashes from the root domain

* Update free-courses-en.md

Added free Javascript30 course from Wesbos

* Markdown video course

Added free Markdown video course

* Update free-courses-en.md

* Update free-programming-books.md

Added a free markdown resource that covers all the basics concepts

* add Construindo APIs testáveis com Node.js book

* ajust alphabetical order

added a new podcast in data science category (pt-br)

* Add esfiddle

* Make alphabetical

* Remove / at the end of url

* Update free-courses-en.md

Added Flexbox & CSS Grid free video resources to the repo

* Update free-courses-en.md

* Update free-courses-en.md

Removed the trailing slashes from the root domain

* Update free-courses-en.md

Added free Javascript30 course from Wesbos

* Markdown video course

Added free Markdown video course

* Update free-courses-en.md

* [ADD] computer programming course in Spanish

* [ADD] author information

Signed-off-by: NFrancisco Javier Llanquipichun Garcia <francisco.llanquipichun@gmail.com>

Updated broken Python Programming book link with newer 3.x version check_urls=free-programming-books.md (#4486)

* Added Kaggle Python course

* Add Python Runestone to interactive tutorials

* added author

* Add: Beginner's Series to: JavaScript & Beginner's Series to: Node.js

* fix link

* add flavio book

* add note to flavio book

* add dicoding free courses

* fix md warning in indonesia courses

* fix ordering issue

* fix blank line

* remove flavio book

Added  python and HTML/CSS course links for beginners as part of hacktoberfest2020 (PR resubmission) (#4298)

* Added a python course link

As  part of hacktoberfest20

* updated free-courses-en.md with a new link

As  per the requirements the link is alphabetically added

* Added an HLML&CSS course link

* Changed the extra blanklines

* updated with platform and tutor name

* updated the course list

* Updated the file again

* updated the list

* Update free-courses-id.md

Add framework Codeigniter3

* Update free-courses-id.md

Hi there,

I deleted unnecessary rows.

Thanks.

* Update free-courses-id.md

Hi there,

I deleted unnecessary rows.

Thanks.

* Update free-courses-id.md

Ok,I have changed the link to "playlist".

Thanks.

Signed-off-by: NFrancisco Javier Llanquipichun Garcia <francisco.llanquipichun@gmail.com>

* Added Dart Programming

* Added dart programing language

Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* add The Rustacean Station Podcast free podcast

* remove slash
Co-authored-by: Nsarit <sarit.pinhas@duda.co>

Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* add node university free podcast

* remove slash
Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* Added data structure course by mycodeschool

* link changed to playlist

* Add Math for Machine Learning by Marc Peter Deisenroth, A Aldo Faisal, and Cheng Soon Ong

* try to fix build failed

* add PDF at the end of the line

* change the better link

* Added 4 Courses

* Update free-courses-de.md

* Changed Category and Title

Changed title to a more generic one and changed name of one course to the original one

* Changed alphabetical order

* Changed alphabetical order