Java User Group Frankfurt (JUGF)

http://www.jugf.de
@jugffm

Java User Group Mannheim (majug²)

http://majug.de
@majug

Java User Group Kaiserslautern (JUG KL)

http://jug-kl.de
@JUG_KL

Java User Group Karlsruhe (JUG KA)

http://jug-karlsruhe.de
@jugka