Quick typing practice
Ranked in these QuestionsQuestion Ranking
Pro Good presentation
Not the most important criterion, but still more enjoyable to have a nice presentation than a stark website.
Pro Great for quick, improvised typing sessions
This isn't really a course, but it goes through the alphabet and monitors the user's progress on each letter. Each "session" is one to three lines of words, sometimes mixed syllabes or invented words that mimic the language digrams and trigrams.
Con Annoying bugs
The site frequently freezes, especially with some keyboard layouts (azerty can't be used more than a few seconds). The user then has to erase the cookies, and pray they will be able to log in again.
Con Dead project
This site doesn't seem to be maintained anymore. There is a bug tracker but it is left unattended.