OpenLayers is a pure JavaScript library for displaying map data in most modern web browsers, with no server-side dependencies. OpenLayers implements a (still-developing) JavaScript API for building rich web-based geographic applications, similar to the Google Maps and MSN Virtual Earth APIs, with one important difference -- OpenLayers is Free Software, developed for and by the Open Source software community.
Live MapDotNet UX + OpenLayers Demo: http://demo.mapdotnet.com/mdnuxopenlayersservice/app/wmsmapdotnet.html
More information on OpenLayers: www.openlayers.org
