PUBLIC MARKS from Spone with tag tiles

Go beyond Google Maps with your own maps Overlay any map and match coordinates

Lightweight Python tile-server using Mapnik rendering and designed to serve tiles in the OSM (OpenStreetMap) scheme.

MapTiler is graphical application for online map publishing. Your map can create overlay of standard maps like Google Maps, Yahoo Maps, Microsoft VirtualEarth or OpenStreetMap and can be also visualized in 3D form by Google Earth. Only thing you have to do for publishing the map is to upload the automatically generated directory with tiles into your webserver.

MapBox is a suite of open source tools to create beautiful custom maps in Amazon's cloud.