PostMO is a database system which monitors moving object(for instance, cars) in cities. It can be used to monitor city traffic. It bases on PostGIS which has a lot of functions to operate geo. objects(such as streets).
libpq for PalmOS enables to connect your Palm handheld to PostgreSQL server through TCP/IP connection. This library provides several functions, a subset of the generic libpq including large object (blob) manipulation functions.