I found this site called HackerRank, it's sort of like Duolingo for programming. It has a lot of small programming questions, challenges, etc.
hackerrank.comSubmitted by twovests in programming
There's a number of different tracks, which each have a number of different problems with different levels of difficulty.
It's sort of like project Euler, except it runs your scores and grades them in browser. I don't think it'd help you learn programming, but it seems like a site for good daily exercises :D
musou wrote
this looks fun, i'll try it out. i already like to use rosetta code and exercism for this sorta thing if you haven't encountered those!