Students practice their rapid recall of multiplication facts.
http://www.mathsframe.co.uk/multiplication_rapid_recall.swf

Other resources by this author can be found at:
http://www.mathsframe.co.uk/free_resources.asp

A matching game for number facts, decimal and fraction conversions, and measurement conversions.
http://www.mathsframe.co.uk/cardgame.swf

Other resources by this author can be found at:
http://www.mathsframe.co.uk/free_resources.asp

Place answers to addition, subtraction, multiplication and division problems on a number line.
http://www.mathsframe.co.uk/placecalcsmulti.swf

You can find more resources by the same author here:
http://www.mathsframe.co.uk/free_resources.asp

Compete against friends, against the computer or against players from other parts of the world in a variety of arcade games. To win, you have to answer addition, subtraction, multiplication or division questions quickly and accurately. You can set the range of numbers if you wish. Highly addictive and great fun! Three thumbs up!!

Jet Ski Addition
Can you answer the addition questions faster than your competitors? Only one way to find out!
http://arcademicskillbuilders.com/games/jetski/jetski.html

Island Chase Subtraction
A fun way to practice your subtraction facts.
http://www.arcademicskillbuilders.com/games/island_chase/island_chase.ht...

Multiplication Grand Prix
A car race with a difference. You power your car by answering multiplication questions as accurately and quickly as possible.
http://arcademicskillbuilders.com/games/grand_prix/grand_prix.html

Drag Race Division
The fastest and most accurate divider will win this race! Will it be you?
http://arcademicskillbuilders.com/games/drag_race/drag_race.html

More games can be found at
http://www.arcademicskillbuilders.com/

Two challenging puzzles.

Here is the blurb:
http://www.teacherled.com/2008/11/11/slide-puzzle-maths/

Here is the multiplication tables puzzle:
http://www.teacherled.com/resources/slidepuzzle/mslideload.html

And here is the equivalent fractions puzzle:
http://www.teacherled.com/2008/11/11/slide-puzzle-maths/

Choose your wheel and answer the questions. The wheels include tables, rounding, squares, and many others.

Left-click to play on-line or right-click (followed by Save Link As or equivalent) to download.
http://www.wmnet.org.uk/resources/gordon/Function%20wheel%20v6.swf

Concentration Memory Game

You can choose to play the game to revise number facts, fraction concepts or fraction-decimal-percent conversions. Very nice implementation!

http://illuminations.nctm.org/ActivityDetail.aspx?ID=73

Drag the number cards to the correct position to make a correct number sentence.
http://www.oswego.org/ocsd-web/games/SumSense/sumdiv.html

Drag each card to the correct location to make a correct number sentence.
http://www.oswego.org/ocsd-web/games/SumSense/summulti.html

You can set the time and the number of questions. Can you beat the clock?
http://www.oswego.org/ocsd-web/games/SpeedGrid/Multiplication/urikamulti...