At html5drummachine.com, a free drum machine makes it dead simple to experiment and produce some simple but surprisingly good music within a short time. Developer Jamie Thomson called it "the most advanced in-browser drum machine available."
“I created this app with the intention that producers could compose and download drum patterns in a highly intuitive and accessible way,” Thomson told Synthtopia.
It's a nifty little tool that emulates five famous drum kits (most notably the TR-808) and allows for impressive customization and exporting. You can then use the beat in another, more advanced music program like Ableton.
Better yet, come back again and your beats and patterns are saved.
H/T Synthtopia | Image via HTML5 Drum Machine