TileCache provides a Python-based WMS-C/TMS server, with pluggable
caching mechanisms and rendering backends. In the simplest use case,
TileCache requires only write access to a disk, the ability to run
Python CGI scripts, and a WMS you want to be cached. With these
resources, you can create your own local disk-based cache of any WMS
server, and use the result in any WMS-C supporting client, like
OpenLayers, or any TMS supporting client, like OpenLayers and worldKit.