Visualizer for multi-touch (pinch-zoom), shows 2-4+ multitouch points on capable devices (G2, Galaxy S, Captivate, Evo); how many on your phone? Shows "snapping" limitations of G1/Nexus/Droid touchscreens.
UPDATES:
-v2.2.2 Hopefully fixed for all devices, incl. if lifting finger n-1 while holding finger n. Please re-rate.