BirDJ turns real birdsong into a beat machine. Tap a grid of birds to fire their calls, or play them on your keyboard. Hold to sustain, drag up or down to bend the pitch. Hit record, play your beat, and share it as a link that replays right in a friend's browser. No app, no signup, no server. Open the demos to hear Ode to Joy, Seven Nation Army, and more, played entirely by birds. Free, from The Sunrise.