Hey Guys, check out this site . Code-Utils is a problem classifier for Codechef. You can search problems by their name, code, author and tags. Additionaly, logged in users can rate, mark as favourite and add tags to problems they have solved. They can also mark unsolved problems as To-Do.
Also watch out for the Compare feature on the site, which lets you compare any two users on Codechef.
Please contact me, if you find any feature on the site, is not working as expected.