Fixed ("C" to "C#")

Added Fragmented Podcast to Android podcasts

[ja] 7 js books

Added geeksforgeeks to the problem sets for competitive programming

Trailing hash signs (#) in headers are ignored. I fixed that with a HTML escape sequence.

Added "ES6 Interactive Guide" on Interactive Programming Resources

Added Codefights to problem sets and competitive programming

[ja] Add 11 books and update a book

Added React.js Fundamentals course

Adding a new python book

Added entry for Julia with tutorials

Update free-programming-books.md

Added React short tutorial for beginners.

add javascript for cats in spanish

Commit Performance WEB

fix link to "Problem Solving with Algorithms and Data Structures"

fix link to "Problem Solving with Algorithms and Data Structures"

Removing  dead links from Django

[ja] Add 10books; C, C++, Julia*3, Pl, Py, R*3

Adding a new python book for the Jython implementation

add html5 book

adds Flexbox defense, a tower defense game you control with flexbox