Made for map navigation, geocoding, and route planning. 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. 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.
All source code is available.
MapObjects Internet Map Server - With ESRI's MapObjects IMS you can download and distribute both vector and raster data over the Internet. FREE viewing online USGS Topographic Maps, NOAA Nautical Charts, Aeronautical Charts and high altitude photography. Includes total US coverage. MapTell GIS - MapTell mapserver is an easy to use map server which can generate interactive maps at the client side. ModelServer Imager - Bentley Systems' ModelServer Imager is a high performance imager server that supports client server imaging over the network and Internet.