Hobnox Audiotool is a free electronic music studio that works right from your internet browser. It's set up almost like an actual recording studio in a way that YOU have to make the connections between pedals, channels, splitters, composers etc. Because of this, composing beats is a bit tedious but definitely worth it once you figure it out. I found this and played around for about two hours or so. I almost didn't go to class. VERY ADDICTING. Here's one I did. Enjoy!
[Make your own HERE]