One or two player noughts and crosses. Click on a cloud to insert a nought or a cross. Perhaps you could extend this version by adding a smarter computer player!
This is an extension of my original NoughtsAndCrosses. It now detects if a player wins. The previous bug of being able to alter the noughts to crosses (and vice-versa) has been fixed. Improvements over version 2 are tie detection and the ability to play against the (random) computer.