http://lightbird.net/dbe2/

There's a free and pretty great interactive edition of HTLCS. Code samples can be edited and executed in the browser. Some code samples can even be stepped through. Add link to this.

The Python Module of the Week series is a tour of the Python standard library through short examples.

Found a collection of free JS ebooks - the meta-lists section seemed the most approprate place to put this.

Added a link to my Python programming book's blog

Deleted and merged two entries for Addy Osmani's book:Learning JavaScript Design Patterns (name was changed when it was published). Added a few author names to the Javascript section as well as Noel Rappin's great book Managing Space and Time With JavaScript.

Great poster!

I added some more Free Python sources and a link to PDF file.

Textbook draft of Probabilistic Models in the Study of Language.

added javascript's http://devdocs.io/

Ng's materials include problem sets, solutions, handouts/notes, and video lectures.
Fixed broken link for PL/SQL Obsession.

Fixed the jQuery index link matching the anchor name.

Site contains a good deal of free books on a wide variety of subjects.