Zoom onto Cologne
Here are some map renderings of colone taken with increasing zoom level.
Dynamic styling of objects
Video of custom app under Windows
Here is a video of a custom app by user
DerKleinePunk under Windows:
The overview page for his project can be found here. It contains some more background information regarding the project (of which the map viewer is only a part of).
Sailfish OSMScout application
Lukáš Karas has a video of his libosmscout based Sailfish application (named OSMScout) and some special videos visualizing the routing algorithm at work.