A large directory of affiliate programs - 800+. Easily compare affiliate programs against one another.
http://www.affiliateseeking.com/
Affiliate Training & Education Centre. Tips and help for affiliate marketers and program managers, and a wide selection of resources
http://www.affiliate-net.net/
Comprehensive ranges of merchants interested in advertising on your website
http://www.affiliatefuture.co.uk
Affiliate marketing forum covering the more popular reprograms
http://forum.abestweb.com/index.php?
Commission Junction – offers the biggest collection of affiliate programs
http://www.cj.com/