Asynchrony
Hosts both closed-source and open-source projects, but with a novel feature: Each member of the project team is assigned tasks, and each task has a certain number of 'shares' allocated to it that represent some percentage of the entire effort. Whenever there is profit to be made, Asynchrony is able to distribute some percentage of product revenues to the people who made the product possible, using the share ownership information.
www.asynchrony.com Details

BerliOS Developer
Free hosting for Open Source projects, using a Sourceforge-like system.
developer.berlios.de Details

Cvsdude
Free cvs hosting for your source code. Add as many projects as you wish and as many developers to your projects as you wish.
cvsdude.kicks-ass.org Details

Dotsrc.org
Provides free Internet and application services, such as CVS, WWW, FTP, PHP, MySQL, Maillists and many more, for selected members of the international Open Source software community.
dotsrc.org Details

Free for All
Full text of Peter Wayner's book, subtitled 'How Linux and the Free Software Movement Undercut the High-Tech Titans'. [PDF]
www.wayner.org Details

Novell Forge
A collaboration website for research and development of open-source projects.
forge.novell.com Details

Open Sources: Voices from the Open Source Revolution
The full text of this O'Reilly book has been made freely available online.
www.oreilly.com Details

Phor.net
Supports CVS-like hosting of projects, through web upload and linux synchronization client.
devel.phor.net Details

Producing Open Source Software - How to Run a Successful Free Software Project
Book by Karl Fogel. Full text freely available as HTML, PDF, and XML.
producingoss.com Details