Look here: http://gowentgone.de/master
This is a pretty simple version of the famous Mastermind game.
Look here: http://gowentgone.de/solit
A simple Solitaire variant. The scoring scheme is like the MS Windows scoring.
Look here: http://gowentgone.de/tetris
A simple Tetris variant. Just the basics. The scoring scheme is like the GameBoy scoring without the extra “Soft Drop” points. (too lazy to implement that)
Look here: http://gowentgone.de/calc/
Type in a number in decimal, hexadecimal or binary. The site instantly gives you the other values and a couple of different representation of that number.