Baltic Environmental Atlas - Interactive environmental maps over the Baltic Sea region. The themes, such as population density and landuse, relate to human impact on the environment in the region. It uses standard user authentication techniques and logs all data access activity. You can add point data to it. Made for map navigation, geocoding, and route planning.
All source code is available.
GeoTools - Free open source java toolkit for producing interactive maps on the web. Supports the shapefile format but support for others, including GML is in development. Latitude Geographics Group Ltd. Geography Network - An Internet portal to spatial data, launched in July of 2001. Seamlessly integrate third party databases into your own internet and desktop GIS applications. MapObjects Internet Map Server - With ESRI's MapObjects IMS you can download and distribute both vector and raster data over the Internet.