keyboardlayouteditor - Powerful, visual designer for designing and editing keyboard layouts.
Grammarly - Clear, effective, mistake-free writing everywhere you type.
Typewise - The next generation keyboard
iTunes - Media player, media library, Internet radio broadcaster, and iPhone device management application
Typing Speed Test - A simple typing test to see how fast you can type
tOndO keyboard - A fast, accurate and easy to learn alternative input method.