I'm a huge fan of Dry Bar Comedy lately! Their app on Android is free, and all of the acts run from 20 to about 60 minutes. There are all sorts of comedians on there. My particular favourite right now is Josh Blue. He has Cerebral Palsy, and has no problem looking fun at himself and his limitations sure to his disability. In my opinion, he should be a WAAAAAAY bigger act. Either way, he's worth checking out!