The Bastille Hardening program "locks down" an operating system, proactively configuring the system for increased security and decreasing its susceptibility to compromise.
Identifrac is a system based upon Don Park’s ingenious Identicons. It can be used to visually represent redundant data, the canonical example being comments on a blog. Imagine if each commenter were assigned an icon unique to their IP.
Ultra Monkey is a project to create load balanced and highly available network services. For example a cluster of web servers that appear as a single web server to end-users.