* Added new MOOC resource

* Changed alphabetical order

* Added a new Java course

* removed trailing slash

* Delete free-programming-books.md

seeing if I can fix this PR - apologies in advance  if it messes things up

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <davorpatech@gmail.com>
Co-authored-by: NEric Hellman <eric@hellman.net>
Co-authored-by: NDavid Ordás <davorpatech@gmail.com>