Institute for the Critical Study of Societies of Capital (http://instcssc.org/) -- Will Barnes' deeply insighful theoretical musings on Community, Capital and Communism. Analysis on the changes in class composition across the planet. Texts on the ecological crisis, as well as ideas about where class consciousness comes from and where possible ruptures might allow for openings for proletarian self-activity.Highly recommended.
Mouvement Communiste http://www.mouvement-communiste.com/index.php?view=&language=EN -- Belgian/French communist group which began as a fusion of the critique of ultraleft ideology and the Italian operaismo experience.
Aufheben http://www.geocities.com/aufheben2/ -- Communist journal from the UK, with theory and critique of worldwide struggles. Influenced by the German/Dutch and Italian communist lefts, the situationists, class struggle anarchism and Italian autonomia. Insane Dialectical Editions also distributes the hard copy in North America (e-mail or write to our address in contacts)
Troploin http://troploin0.free.fr/ -- Dauve and Karl Nesic's website, in French and English, with older texts from La Banquise. These writings fuse the best of the German/Dutch and Italian Left traditions, synthesizing them into a contemporary theory of communism.
LibCom http://libcom.org/ -- From the U.K., a comprehensive archive of libertarian communists texts and extensive discussion forums, and much more...
LINKS TO OTHER GROUPS/ARCHIVES
Bureau of Public Secrets: http://www.bopsecrets.org/
Class Against Class: http://reocities.com/cordobakaf/
Collective Action Notes http://www.redemmas.org/collective_action_notes/
For Communism - John Gray's website: http://www.geocities.com/~johngray/
Industrial Workers of the World http://www.iww.org/
Internationalist Communist Group http://gci-icg.org/
Internationalist Perspectives http://internationalist-perspective.org/
"Left-Wing" Communism: an infantile disorder http://www.left-dis.nl/
Marxists Internet Archive http://www.marxists.org/
Paul Mattick Sr. homepage http://www.home.no/mattick/
News & Letters http://www.newsandletters.org/
Marty Glaberman Achive (formerly Red & Black Notes): http://www.marxists.org/archive/glaberman/index.htm
Situationist International Text Library (at Not Bored): http://library.nothingness.org/articles/SI/all/
Wildcat (German): http://www.wildcat-www.de/en/eindex.htm
Wage Slave X: http://libcom.org/tags/wage-slave-x
World Socialist Web Site http://www.wsws.org/
SAN FRANCISCO BAY AREA LINKS OF INTEREST
Niebyl-Proctor Marxist Library http://www.marxistlibr.org/
LaborFest (July 5-31 every year) http://www.laborfest.net
Marc Norton Online http://marcnorton.us/
LINKS OF INTEREST ELSEWHERE
Chanfles! (Los Angeles) http://www.chanfles.com/