Carfree.com: dedicated to the proposition that urban life is not only possible but also better if transport is organized so that private automobiles are not used on the city's streets
Carolyn McDade, a composer about whom my mother produced a video
Charity Navigator: America's premier independent charity evaluator, works to advance a more efficient and responsive philanthropic marketplace by evaluating the financial health of America's largest charities
Cluetrain.com: tries to give companies clues, and contains a bit of baloney and a bit of insight
Cosmetics Database: cosmetics safety database from Environmental Working Group
DjVu Zone, which has information about DjVu, an interesting image compression design for documents
DoubleClick ad opt-out page, where you can disable DoubleClick's advertising-based tracking of the sites you visit. You must do this once for each browser and computer.
DSL Reports: reports on quality of service, etc. for DSL providers
Evite.com, which helps you coordinate parties and other events by sending electronic invitations, tracking who will and will not attend, helping you purchase gifts, etc.
Hunger Site: donate food to fight starvation just by clicking a link (paid for by sponsorships)
I-Neighbors: Your Neighborhood's Home on the Internet
Idealist.org, a project of Action Without Borders that helps one find information on volunteer opportunities and non-profit and community organizations world-wide
Museum of Reconstructions: uses computer modeling technology to develop accurate and complete reconstructions of buildings, artworks, artifacts, and sites
National Novel Writing Month: a fun, seat-of-your-pants approach to novel writing. Participants begin writing November 1. The goal is to write a 175-page (50,000-word) novel by midnight, November 30.