Picopicogames
Picopicogames contains quite a few set of games that you can enjoy. Whether you fancy playing a puzzle game, a racing game or an RPG; you'll find one right in this bunch.
The entire compilation of games is meant to be small and simple so that players can easily play and breeze through them if they find some extra time on their hands. It's a wonderful way of keeping yourself occupied while you're waiting for your turn in line or waiting for someone to arrive.
The game was last updated in August 2010 and it works great on the iPhone, iPad and iPod Touch. Give the game a try by getting it at the App store. It's absolutely free!