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
twovests OP wrote
You can see their different things here:
https://www.hackerrank.com/dashboard
This is really exciting for me. I'm rusty on my Bash skills and Java skills, and haven't done much C++.