Samvada (currently free in the app store) turns your iPhone/iPad into a set of sympathetic strings, tuned to the notes of a raga. Designed for practicing and performing Indian Classical music, Samvada is also fun to use for everyone - it turns everything the microphone picks up into tuneful sound.
An interactive camera app that responds to movement in real time, warping the image feed. Wave your hands around, move your head or pull facial expressions, and watch the image distort in amazing ways. [more inside]