Ossisoft

Simple freeware desktop alarm clock

Solves the game Su Doku

Row your boat across the Niagara Falls using the arrow keys on the keyboard trying to avoid the logs. No installation or un-installation required, just unzip the files and run the exe. Simple, clean, easy and free.

Play 3D naughts and crosses (also called Qubic and tic-tac-toc-toe) on your PC. Choose one of 4 computer opponents and you can tinker with the AI. There are options to take back moves, set the computer to play itself, rotate the view.

This nifty little freeware programme plays the game chomp against you. You have to avoid finishing a rectangular chocolate bar as you take turns to eat rectangular bites. There is nothing to install, just run the exe.