* Add raytracing in one weekend

* Add html to entry.

* Remove trailing slash

* Add App Inventor category and book

* Fix header level

* Add additional App Inventor book

check_urls=free-programming-books.md

* Switch link to official page for added book

check_urls=free-programming-books.md

* bilisimio android dersleri

* modified and deleted broken links

* deleted blog link

Edit Author's Name Vietnamese
Edit Courses's Name
Add More Courses

* Update free-programming-books-ko.md

* Remove trailling slash

* Update free-programming-books.md

* Update free-programming-books.md

* Add Some Arabic Courses

* make travis happy

* fixed last travis issues

* change titles

* engenharia-de-software-moderna

* Update free-programming-books-pt_BR.md

Add new Java course from Stepik

* add more courses vietnamese

* fix link youtube playlist

* check_urls=free-podcasts-screencasts-ru.md

* Update free-programming-books-fi.md

Fixed a 404 link

* Update free-programming-books-fi.md

Changed the docplayer link to an archive.org link.

* Added Golang course.

* Added a link for the Chinese courses in the readme.

* Removed old free courses-zh_cn.

* Added new interactive tutorials.

* Added extra line.

* Updated file path.

* Updated file path.

* Add link to Go book

* Link Darker Corners of Go article instead of book

Unfortunately not free but 50$ online course :/

* Added a book.

* Changed the section for APL book.

* New Sections for .NET Core stuff

- Added 2 new sections: ASP.NET Core and .NET Core
- Added books to respective new sections, including from Microsoft Docs
- Blazor is now under ASP.NET Core Section

For issue - https://github.com/EbookFoundation/free-programming-books/issues/5326

* Fixed formatting and alphabetical ordering

* Added JavaScript Interview #35 book.

* Added email address requested, not required note.

* Add link to Node.js book

* Add link nodejs.dev book

* Add link nodejs.dev book alphabetical order

* Add link nodejs.dev book empty line

* Update title

* Update free-courses-pt_BR.md

Add free course Python básico from Solyd (https://solyd.com.br/treinamentos/python-basico/)

* Update courses/free-courses-pt_BR.md
Co-authored-by: NSeth <seth@elypia.org>

* Add Italian course "Programmazione Basic Commodore 64"

* Move Retrocomputing course under "Miscellaneous" category

* add some free Arabic programming books

* correct spaces

* correct heading spaces

* Update free-programming-books-ar.md

* Update books-ja.md / add Ruby Scripting

* Fix alphabetical ordering

* Add Italian video course about Docker

* Fix typo

* Fix Docker course name

* Changed link that causes error 301 and redirect

This change switches the previous link that causes a 301 error and a redirect to a direct link to the correct page.

* Removed #fragment from link

* remove broken link

* update broken link
Co-authored-by: NSam Hsiao <samhsiao@pilottv.com.tw>

Github -> GitHub

* Replace the warez link (b-ok.cc) with a web.archive.org link.

* Replace PDF version 2.1.1 with 2.2.1 for Python 2.
* Add the PDF version for Python 3.
* Add the current edition (HTML).