www.marxists.org - an extensive database of material from a great number of Marxist and socialist thinkers.

www.newleftreview.org   - Well-established and respected academic journal of left theory comprising writings on politics, history, theory and philosophy.

http://www.labour.org.uk/ - Website for the British parliamentary Labour Party.

http://www.renewal.org.uk/ - A journal of social democracy.

http://www.redpepper.org.uk/ - An independent, left-leaning magazine/website of politics and culture.