Google Developer Group (GDG) Stuttgart
TEDxStuttgart
Quantum / computational / theoretical chemistry
SoLoMo, Google+ content curation
Online support for Google's consumer products
Getting Things Done (GTD)
Translation/localization: TEDTalks, TweetDeck, Twitter, Foursquare, etc. (En|De|Ru)
Wikipedia contributor
Teetotaler, huge smoothie lover! :)