QMentat helps you practice mental arithmetic. It uses arbitrary-length fixed point arithmetic, and can handle any size numbers, only limited by the size of your screen (and in the case of division with an integer result, the speed at which the number can be factored). It is also quite configurable, allowing you to tailor the questions to your needs.
HackIt! is a strategic game where your goal is to control as many Web sites as you can by hacking them. It is played on an infinite map (the whole Web) where hackers struggle for the control of the Internet. The game involves scanning sites to know who they belong to, hacking your friends' favorite pages, or tracking them to kick them out of the net.
BOH is a unique retro-flavoured puzzle-riddled maze game. The player moves in claustrophobic, mysterious, dangerous battlefields searching for the Evil Masters, who throw countless enemies at you until you discover and face them in the final battle. Although quests are made slightly less hard by the power-ups scattered all around, carrying out the missions demands lots of concentration and quick reflexes. New missions and themes can be added anytime, and you can even create your own.