A friendly forum especially for keepers of corn snakes- http://www.thecornsnake.co.uk/
Big forum covering all reptiles, exotics and domestics- http://www.reptileforums.co.uk/
Online corn snake genetics calculator- http://www.corncalc.com/index.jsp
Morph guide- http://iansvivarium.com/morphs/
Excellent courier service- http://www.wildworldreptiles.co.uk/