The 3D models of inner city Berlins buildings are open data: businesslocationcenter.de/en/downloadportal
Berlin has launched a Open Street Map based service that shows in realtime positions of public transport train and bus traffic. The display of busses is turned of by default. Check the respective box in the “Fahrten” column to turn it on.
daten.berlin.de provides access to berlin specific open data sets.
The Panono Camera captures a spherical panorama when you throw it up in the air.
The Berlin based electronics online shop TinkerSoup is reselling electronic components of lots of tinkerers favorite companies: 4D Systems, Fritzing, Olimex, Pololu, Sharp, Smart Projects, Spark, Fun, ThingM, USGlobalsat, Adafruit
Seems the domain was sold to UK based Pimoroni
A great shop for tinkerers in Berlin is sertronics they sell online but have also a brick and mortar store. They are also an official raspberry reseller.