Atratus runs binaries built on Linux on WIndows. It is a system call translator similar to UML (User Mode Linux). It can run some games and busybox utilities.
Vinace is another Apple //e emulator. Vinace emulates a 64k Apple //e, with disk II drives, joystick, and monitor.
A query analyzer that parses Redis' MONITOR command for counter/timing stats about query patterns.
A robust keepalive framework for Linux Virtual Server and router HA.