Company Codelle created these great apps:
ChordFinder - Piano Chord Finder for Serious Musicians, MidiSpy - Midi packet capturing and diagnostics tool, ChordFinder for iPad, TurboTuner - Chromatic Tuner for Guitar, Bass and more, SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more, MidiPad 2, SocialScreen - Social Media Presentation Display for Twitter and Facebook, SignalSpy - Audio Oscilloscope, Frequency Spectrum Analyzer, and more, TurboTuner - Chromatic Tuner for Guitar, Bass and more, Fretboard Trainer, Fretboard Trainer - Learn the notes for guitar and bass, and others..