The JUMP DB Query Plugin is an extension for the OpenJUMP GIS platform that allows OpenJUMP users to give arbitrary database queries to retrieve and display geographic feature sets.
Spatial databases currently supported are
PostGIS, Oracle Spatial, MySQL, and SpatiaLite.
GeoKettle is a powerful, metadata-driven spatial ETL (Extract, Transform and Load) tool dedicated to the integration of different data sources for building and updating geospatial databases, data warehouses and services.
Integrate large databases of points with Google Maps without overloading db or client browser. Server-side example in simple PHP with server & client side caching, easily portable. Data loaded in chunks and when zoomed an area overview is shown. Simple D
GeoClass for PHP provides classes to handle georeferenced data. Features are: circumference search in (relational) databases, handlers for NIMA-DB and openGeoDB, distance calculation, creation of maps from .e00 or .ovl files and more (rdf, soap, etc).