Spacejunk is a computer game about traveling in 2D planetary systems. The player must collect drifting garbage by navigating through the gravitational fields of planets and stars. A simple editor for planetary systems is also provided.
Quadrupleback is a video game in which intruders must be circled. It is based on Doubleback, a Tandy Color Computer (CoCo) game by Dale Lear, published in 1982.
A secure Linux system with Grsecurity and many penetration tools.
A control protocol for various astronomical instruments (telescopes, CCDs, etc).