Company Goodman Productions created these great apps:
Interval Countdown Timer, Interval Countdown Timer Free, Audio on Cue, My Debt Payoff, Back-Time Calculator, Audio on Cue Free, My Debt Payoff Free, Mobile Warm-Ups, ProMazer, ProMagic Squares, Triangle and Stars, Line Buddy, Audio on Cue 2, Audio on Cue 2, and others..