Here are a few free online tutors to increase your typing speed and accuracy, whether you use the Columbus (Find the Keys and land on them)(HA!) or QWERTY Touch Type method.
Click on the images to visit the sites.
This is my favorite. Instead of typing disjointed words, typing reveals a story. Interesting stories at that. Then there are the tying drill and a Dance Dance Revolution-type challenge, backed by a sweet electronic groove.
Speed Typing Online includes a diagnostic test and games, The typing lessons teach home row by indicating the proper finger/key combination, with the keyboard on screen.
Keybr.com is a good one, because you actually type words/prefixes/suffixes, rather than home row letters to help you become a “typing ninja.”
Free Typing Game has a fun selection of old school arcade games, such as this version of Asteroids, where you type the letters to defend your spaceship.
Typing.com has similar games, but with nicer graphics, which consequently took longer to load.
Did I miss your favorite? Feel free to recommend other free typing tools in the comments.