There are a number of free programs on the internet that allow you to practice keyboarding (typing) skills:

http://www.goodtyping.com/ - learn to type correctly

http://www.learninggamesforkids.com/ - offers several typing practice and learning games

http://media.abcya.com/content/typing_rocket/typing_rocket.swf - fast (60 seconds) game to practice typing.
http://www.nitrotype.com/ - type and race against friends
http://play.typeracer.com/ - practice, play a typing race, race against your friends

http://phoboslab.org/ztype/ - typing game with 2 levels

http://www.powertyping.com/ - lessons and games

http://s.typingclub.com/schools.html?cmp=ftt&ad1 - free program that lets you monitor student progress

http://www.typingtest.com/ - my favourite to use with students. Can set time. Good for HS. 

http://www.typingweb.com/ - lessons for learning to type
http://www.wordgames.com/ - variety ofgames including typing challenges
http://www.davis.k12.ut.us/cjh/appliedtech/Business/Keyboarding/Index.html

http://www.bbc.co.uk/schools/typing/flash/stage1.shtml