FreeTechBooks.com: A Directoryof Free CS and Programming Books

FreeTechBooks.com is a nicely organized directory of freely available programming and computer science books and lecture notes. The free books listed are usually available directly on the publisher's Web site. The classifications on the left side includes books in Computer Science, Operating Systems, Programming and Scripting, and Related Fields. A search box will search title and descriptions of the books but not their full text. Based on the numbers per category, it looks like it includes about 100-200 titles. While some of the titles are available via sources like The Online Books Page, others are not included there.