Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
keyboardlayouteditor - Powerful, visual designer for designing and editing keyboard layouts.
Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
Typewise - The next generation keyboard
KeyWi - Use your computer's keyboard to type on your iPhone or iPad
Typing Speed Test - A simple typing test to see how fast you can type