A partial list of the clients I've served:
Economics and Finance
German Institute for Economic Research (DIW Berlin)
Centre for European Economic Research (ZEW Mannheim)
German Federal Ministry of Economics and Technology
Fortis S.A.
Energy, Environment and Environmental Technology
Veolia Environnement
World Wildlife Fund
Citelum Deutschland GmbH
Enertrag AG
Krümmel Nuclear Power Plant
Manufacturing and Business Services
Arcelor Mittal
Giesecke & Devrient
NITTEL GmbH & Co. KG
CoActive Technologies, Inc.
IT
hinrichs+müller GmbH
Wacom
T-Systems
MAXDATA
Toshiba
ALK Solutions
MicroPayment
Natural Sciences
Technical University of Braunschweig
Cytolon AG
Range Fuels
Literature, Humanities and Social Sciences
University of Klagenfurt, Department of German Studies
University of Innsbruck, Department of Comparative Literature
Free University of Berlin, Department of History and Cultural Studies
Ceryx.de
Advertising and Marketing
Scholz & Friends NeuMarkt GmbH
claudiusbähr+friends gmbh & co. kg
Wall AG
Film and Media
German Federal Press Office
Fnac
ODS Business Services
Elementarfilm
islandfilm.de