Mikado Giessen, Karate club
mikado-giessen.de
Nice tutorial for the first hardware steps with AVR (german)
AVR-Tutorial
Introduction to C programming for AVR (german)
AVR-GCC-Tutorial
F19 Ham Radio Club Wetzlar
f19.de
Team Chaos Giessen
giessen.ccc.de
Hackerspace Wetzlar
hackerspace-wetzlar.de