A site where children can play against others for a place in their own class high score table.
Practice your tables whilst playing... billiards
The home page of Count on maths year web site (UK)
An online (and downloadable) maths problem generator to practice for 60 seconds- pity there's not a hi-score table as well!!
Woody games - a variety of levels from simple GFS to crossword completion (teeth)
Tables testing software swopped for your school's email address