1) Shodor Interactive - General Coordinates
2) Billy Bug - see how quickly you can complete this activity!
Level 1 - (positive numbers only)http://resources.oswego.org/games/BillyBug/bugcoord.html
Level 2 - (positive and negative numbers)
http://resources.oswego.org/games/BillyBug2/bug2.html
3) Coordinate Grid
http://www.primaryresources.co.uk/online/coordinates.swf
4) Find the Hurkle
http://www.aimsedu.org/aimskids/ipuzzles/hurkle/index.html
5) FunBrain - What's the Point?
http://www.funbrain.com/co/index.html
6) Planet Hop
http://www.bbc.co.uk/education/mathsfile/shockwave/games/planethop.html
7) Top Quark