distributed.net - A distributed computing project currently trying to take the RSA challenge of RC5-64, and also working on OGR-24 (Optimal Golomb Rulers).
Climate Dynamics At RAL - Casino-21 is a project to predict long-term climate changes. Project information.
Computing Minimum Equal Sums of Like Power - Software download, computation records, and project description.
CycleTraders Network - A cooperative of networked sites that gather performance information about each other.
Distco - Software to harness the spare computing power of an existing network. Product information and contact form.
Distributed Computing Project Links - Includes recent news, and links and descriptions of projects that people can join.
Fight AIDS at Home - Models the evolution of drug resistance. Project information and software download for Windows.
Folderol - Distributed project to perform computational protein folding. Project information and screensaver download for Windows.
Folding@home - Protein folding simulations. Project information and software download for Windows, Linux, Solaris, and Macintosh.
Genome at Home - Project design new genes that can form working proteins in the cell. Project information and software download for Windows and Linux.
Golem@Home - Evolving artificial intelligence for mechanical robots. Project information, FAQ, and software for Windows.
Intel Philanthropic Peer-to-Peer Program - United Devices Cancer Research Program uses spare CPU cycles to identify promising drug candidates in the fight against leukemia. Overview, installation steps and FAQs.
K-Optimal Lattice Rules - Whitepapers and software.
PiHex - Project to calculate specific parts of Pi. Source code and project information.
SUM99 - Project to calculate the minimal equal sums of like powers. Project information, software, and records.
Computing Science: Collective Wisdom - From American Scientist -- excellent article.