Things I've Built
AllMyAlgorithms
The aim of the http://allmyalgorithms.org/ semantic wiki is to collect, categorize and relate all algorithms and data structures.
The HERD of Educational Robotic Devices
The HERD of Educational Robotic Devices project aims to provide open hard- and software of simple, small and cheap swarm robots designated for high school education. http://herd-project.org/
Lutetium
Just a link to my blog: http://bihlmaier.org/
Currently, very low volume, but I'm trying to document more stuff going on - especially, what is not directly visible on https://github.com/andreasBihlmaier either.