ISR

[Tommy-K]

http://www.anticapitalism.org.uk/

International Socialist Resistance homepage. They are a socialist youth group in many different countries. I am planning to join the UK branch. Check out the site. They are closely affiliated with the Socialist Party of the UK.

[RedGeorge]

Although not a 'proper' member, I have looked into this group before, and I think very highly of them. One day soon I might just join and go all the way...