Free Computer, Development, Technical Ebooks at blueportal.org
Good web site for obtaining technical, development, and I.T. ebooks, content, and documentation.
Over 70 freely available I.T. and Programming Ebooks
Freely available I.T. and programming ebooks covering programming (C, C++, C#, Java, Perl, Python, Assembly, Game) and operating systems (Windows, Linux, Unix).
Freely Available Technical Computer Books
Web site hosting freely available technical computer books in the following areas: MySQL, Samba, Regular Expressions, PHP, Javascript, Java, Enterprise Java Beans, Perl, Networking, Unix, Web Programming, Web Design and Development, Oracle, PL/SQL, Linux, XML, Firewalls, Security.
Free On-line Linux Books and Tutorials
Up-to-date Linux Books, Tutorials, and Manuals. These cover many topics, including Gtk+/Gnome, MySQL, Linux Security, Red Hat Enterprise Linux, CentOS Enterprise Linux, Red Hat Fedora Core, Ubuntu, Debian GNU/Linux, Command-Line Tools, C Programming, Perl Scripting, Bash Scripting, Linux Kernel Module Programming, Xen Linux Virtualization, Linux Tools & Utilities, GCC, Linux Debugging, and Linux Developer Tools Guides.
Free Books for RHCE, Oracle, Networking, Unix, Perl, Web Development
Here are freely available computer books covering Red Hat Linux RHCE certification, Oracle database, Networking, Unix, Perl programming, and Web development and programming.
Free Books for Databases, Networking, and Operating Systems
Here are several free books and tutorials covering Databases, Networking, and Operating Systems. This linked list contains 4 free database books, 6 free networking books, and 27 free operating systems books and tutorials.
540 Free Chapters from Addison Wesley
Here is a blog post I wrote that demonstrates a google search that returns most of the free chapters offered by Addison Wesley on their web site. You can modify this search by adding keyword(s) to it, as I have shown.
103 Free Book Chapters from ftponline.com
Here is a google search that returns 103 free book chapters from ftponline.com, mostly covering Microsoft .Net technologies, but also some Java, PHP, and Web Services.