Sphere Online Judge a.k.a. SPOJ is a very good online judge. Still, beginners face a lot of trouble when they first come to SPOJ, mainly because SPOJ is not as well categorized as some other judges out there. Recently SPOJ is trying to offer problem hints, but due to being community driven, this is still a long shot. Classification hints for SPOJ problems are not commonly available in the internet as well. So far I have managed to solve a few dynamic problems from SPOJ and I think for someone who is trying to practice dynamic programming problems from SPOJ, this short list might come handy.
Please feel free to add more in the comments. Thanks