Company Paul Cohen created these great apps:
Sweat It, Two Of, WhichIsIt, SwapEm, The Good Squares, FitEm, CompletingTheWords, Mad Minute Math Exercises, Activity Pad, My Oh My Word, WheelsAround, Same Letters Different Word, You Say What?, Mental Chronometry, TDRC, Poking Pals, Obscured, InCommons, Must Have, My Little Words, and others..