OpenContent
Reason for being: "facilitate the prolific creation of freely available, high-quality, well-maintained Content." Content = everything but software. http://www.opencontent.org/
Internal Revenue Service
The IRS is the U.S. government agency responsible for tax collection and tax law enforcement. Contains downloadable forms, instructions, and agency publications. It also includes "The Digital Daily," an almost-humorous online newspaper. http://www.irs.gov/
SPACE.com
Provides updated space news, discussion boards, extensive photo galleries, and items for sale. http://www.space.com/
Psych Web
One of the oldest and most well thought-out indices to psychological resources online, by Russ Dewey. http://www.psywww.com/