Brian G's List: Web-based GIS

Web Maps Studio is a suite of tools that gives web developers everything they need to create customized, interactive map based web apps. Full integration with Style Editor, Data Market place and CloudMade’s other geo services means that developing feature-rich web app has never been easier.

The Systematic Maps is a mapping resource website that provides eight different map types. It has a variety of added services including GPS positioning using Franson software, Skyhook Loki positioning from WiFi signals, search, routing and directions, exporting and importing GPX tracks, reverse geocoding, Wikipedia entries, geocoding, weather, Geohack links, email links and Facebook.

Navigate the map, doubleclick it to get local point-data, easily geo-query vast databases, and fly with TerraFly® Web tools, from autopilots to pro viewers. View Imagery and Data anywhere in the United States and in much of the World.