keyboardlayouteditor - Powerful, visual designer for designing and editing keyboard layouts.
TypingMaster - Learn touch-typing technique, and improve/increase typing accuracy and speed.
Typewise - The next generation keyboard
amphetype - Advanced typing practice program
Typing Speed Test - A simple typing test to see how fast you can type
TypeLit.io - Improve your typing by practicing on classic books such as Alice in Wonderland, Frankenstein, and The Art of War -- or get a monthly subscription and import your own EPUB, PDF, and TXT files.