Junkyard Jet Engine
There is an entire hobbyist community based around building junkyard jets. Here’s where I try my hand at it.
Open Source VTVL
A free and open source hardware and software project centered around the use of linear aerospike rocket engines and wingless design to make a vertical takeoff, vertical landing suborbital vehicle. The most innovative part of it? The AI software that drives a fully interactive flight-control system. Concept complete–project page to follow soon.
Producteev API Library (C#.net) An implementation of the Producteev.com API in C#.net. This has ceased development to make way for a better, open-source implementation as of December 6th, 2012.