Open source tools used in CloudMade
Mapnik
Map rendering engine
Project Leader: Artem Pavlenko
Used in: Tiles
mod_tile
Real time tile rendering plugin for apache
Project Leader: Jon Burgess
Used in: Tiles
Contraction Hierarchies
Routing algorithm
Project Leader: Robert Geisberger
Used in: Routing
PostGIS
Map rendering database
Contacts: http://postgis.refractions.net/documentation/manual-1.3/ch01.html#credits
Used in: Tiles, Routing, Geocoding
GeoAPI
Map rendering database
Contacts: http://geoapi.sourceforge.net/team-list.html
Used in: Tiles, Routing, Geocoding
geopy
Geocoding toolbox for Python.
Project Leader: Brian Beck
Used in: Geocoding