Fingerlab has Rockmate (iTunes Link) for the iPad in the iTunes App Store for 99-cents for a limited time. This deal expires 27, 2012.

Rockmate turns your iPad into a complete music studio easy and super fun to use. You can compose, record and play songs with up to 4 Rock players on one single iPad. Rockmate is easy to play with smart chords progressions, sounds great with separated guitar effects and in-house produced audio samples and is also fully customizable with multiple drums and keyboard styles. Your guitars are always well tuned, no need to carry your drum kit or to patch your keyboard. A smart metronome and a real-time looper will assist you in composing and recording your songs. Share your songs by email or iTunes sharing folders.