VectorTileMap is a vector-tile map viewer currently developed at University of Bremen. This application is based on mapsforge and extends it with an OpenGL renderer to enable continuous scaling of the map view (http://code.google.com/p/mapsforge/). An additional PostGIS backend is also under develpment which is intended to ease creation and compilation of multi-resolution maps from different data sources. precompiled binaries and maps are at http://code.google.com/p/vector-tile-map/downloads