Anotehr set of python based GIS (tools) projects:

• gispython.org
  Open Source GIS-Python LaboratoryThis is the home for several web mapping and GIS projects based on PROJ.4, GEOS, GDAL/OGR, MapServer, and the etree XML interface. Our goal is a new coherent and modular core for geospatial programming with Python.
  (tags: software python opensource gis geo)