* Update free-programming-books-es.md

Add Piensa en Perl 6 (Spanish translation of Think Perl 6)

* Update free-programming-books.md

Add another Perl 6 book. Nowadays Perl 6 is also known as Raku (https://marketing.perl6.org/id/1541379592/pdf_digital) and the name Rakudo refers to the only major Perl 6 compiler at the moment. Also update status of 'Using Perl 6'.

* Update free-programming-books.md

Alphabetize list

* add space to satisfy linter

* Update free-programming-books-es.md

* Spanish SVN book

* Add svn to index

* Add svn to index x2

* Try to fix this

* Try to fix this x2

* wtf

* O'RLY?

* Add new book of React and Redux (Spanish)

* Fix Lint

* First update

Title Algorítmos y Estructuras de Datos

* Fixed latin accute letters

We had a variety of ways to denote Wikibooks. It seemed appropriate to add "wikibooks" as the "author" and remove "wikibook" from the title, since the books don't use "wikibook" in their titles.

* Adding Harvard GSE Scratch Book

* Adding foreign language for scratch guide from harvard graduate school of edu

* linting

* remove broken links

* remove broken links

* remove broken links

* fix broken links

* fix broken links

* fix broken links

* fix broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* replace dead link

* Add list of courses in Spanish.

* Update readme to add list of courses in Spanish.

* Correct titles in the list.

* Update free-programming-books-es.

Update, add and clean links. add books, add authors and correct types of
documents. Delete paid links or broken.

* Correct cli errors.

* Correct Cli Errors - 2

* Fix alphabetical ordering.

* Fix alphabetical order and a some link and angle bracket.

free-courses-es.md: Correction of links and anchors.
free-programming-books-es.md: Alphabetical ordering.

* Fix 2635#pullrequestreview-76815495

@eshellman If I finish with updating the documents in Spanish  #2635
before Black Friday.
You could give me a new pc for me work?   👅 Of Christmas
🎁...  🤐 🤐       Ok, joke..
sorry.

I m going to work 💪  ☺ I need to do it, to feel satisfied
with myself 😎

* implement #2357

* misc cleanup

* Replace homepage with GitHub repository link

problem-sets-competitive-programming.md: Replace homepage
link of problembook with github repository link which contains
downloadable pdf links.

* Remove broken links

Remove broken links and update available links from
web.archive.org.

* Update broken link with updated link.

Update the description for the updated link.

* Update broken links with links from web.archive.org

Remove dead links.

* Restore path to original link instead of web.archive.org

The link seems to be working fine. It was not loading
on my network, probably due to regional restrictions.

* Remove github link which is no longer maintained.

Github link consisted of list of Big Data resources.
The repository has been deleted by the user.
Hence deleting the entry.

* Add a book to JavaScript section (Spanish)

Spanish: free-programming-books-es.md

### JavaScript
- [JavaScript, ¡Inspírate!](https://github.com/UlisesGascon/javascript-inspirate)

* New order

New order

* Update broken links

* Small fix

* Update broken link

* Remove problematic links

* Fix according to comments

* Formatting

El enlace del libro "El modelo relacional y el álgebra relacional" ya no funcionaba. Lo actualicé con un nuevo enlace que sí sirve.

Possible fix for broken link.

Fixing broken link.

Suggestion for new link.

The link no longer works.

hhttps -> https

This fixes some 404s by removing them or changing the link if it's moved to a new location or avaliable elsewhere

think like a computer scientist was broken