Geburtstagskalender
Birthday calendar of German Wikipedians.

Reworkhelper
General descriptions of retouched pictures.

LiTaFi
Licence Tag Finder translating Commons licenses into dewiki-licenses and in vice versa.

User contributions
Search contributions for a given username or an IP address in all wikis.

gWatch
One watchlist for all wikis of the wikimediafoundation.

Cropbot
Simply crop images on commons.

derivativeFX
Upload derivative works to commons.

Meilensteine
Meilensteine der deutschsprachigen Wikipedia.