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.
HolyGrail is an implementation of the GTD's next action list. In other words, it's a kind of todo list. It is composed of realms (contexts), quests (projects), and missions (todos). A realm groups missions, and generally represents a location or a situation, e.g. "at work", "at home", or "code". A mission is the next physical action to do to complete your goal. A quest is a succession of missions; it represents a goal. Every time what you are planning requires more than one next action, create a project.
SourceSquare is a scanning solution based on Antepedia, a large open source knowledge base that includes more than 1,000,000 open source projects from the main forges. SourceSquare scans a folder on your hard drive and displays a tree map that shows which part of your source code is open source.