Patriots for Peace - believes that one can be a patriot of the U.S. and also oppose the government's leadership mode.
Poets Against the War - site hosts thousands of poems for peace. Also has information about antiwar poetry readings.
the wartime project - pieces meditating on, reflecting on and reacting against wars, past, present and future.
Human Shields - group of volunteers that stationed themselves around Iraq to act as human deterrents to war.
Win Without War - advocated alternatives to preemptive war against Iraq.
Peace Posters - download and print posters, or submit your own design for others to use.
Peace Not War - streaming audio of a selection of anti-war songs.
protest records - free antiwar MP3s from Cat Power, the Beastie Boys, and other artists.
Lysistrata Project - theatre event for peace in which "Lysistrata," Aristophanes' comedy of ancient Greece in which women withhold sex until men agree to outlaw war, is read around the world.
Doe v. Bush and Rumsfeld - full text of the complaint asserting the resolution passed by Congress in October 2002 did not specifically declare war and unlawfully ceded the decision to Bush. Filed February 13, 2003. From FindLaw.