1917.com 
Russian Marxist site in English. Includes a work cataloguing current leftist parties in Russia.
http://www.1917.com/Red Future 
News about the Left. Information on Marx, Engels, Lenin, Trotsky, and Guevara.
http://www.angelfire.com/mn2/Communism/
Red Piranha 
Repository of information about the history, leadership and current politics of left-wing parties and movements around the world.
http://www.geocities.com/CapitolHill/1884/
The Socialism Organization 
Essays and news archives from China's People's Daily, chatroom and links about socialism "with Chinese characteristics." Sponsored by the Wyith Corporation of Hong Kong.
http://socialism.org
Anglo-Catholic Socialism 
Social gospel. The socialism of religion.
http://www.anglocatholicsocialism.org/
Computers and Socialism 
Ideas on the topic from Andy Pollack.
http://www.geocities.com/ResearchTriangle/Lab/4603/
La Revolucion 
A site of multimedia information and links.
http://www.geocities.com/SoHo/Easel/6476/
Jubilee Group 
A loose international network of socialist Christians, mostly within the Catholic tradition. Articles, publications, events and contact information.
http://www.anglocatholicsocialism.org/jubilee.html
The Death of Socialism by Roger Kimball 
Essay examining the decline of socialism.
http://www.newcriterion.com/archive/20/apr02/social.htm
Wikipedia: Socialism 
Definition and discussion of the subject from the online encyclopedia, Wikipedia.
http://en.wikipedia.org/wiki/Socialism