OpenLayers-Free maps to web

Hi ,i want to share this with you all...
OpenLayers is based on Pure javascript.
Example: http://openlayers.org/dev/examples/

• OpenLayers is a pure JavaScript library for displaying map data in most modern web browsers, with no server-side dependencies.
• OpenLayers is Free Software, developed for and by the Open Source software community.
• It provides an API for building rich web-based geographic applications similar to Google Maps and Bing Maps.
• OpenLayers is intended to separate map tools from map data so that all the tools can operate on all the data sources.
• OpenLayers is used by OpenStreetMap project for its “Slippy Map” map interface. http://www.openstreetmap.org/
• The library includes components from the Rico JavaScript library and the Prototype JavaScript Framework.
• OpenLayers Load map data from many sources:
  Google Maps
  Yahoo! Maps
  Virtual Earth
  ArcGIS Server
  Web Map Service
  Web Feature Service
  OpenStreetMap
  UMN MapServer
  MapGuide Open Source
  GeoServer
  ka-Map
  World Wind servers
  GeoRSS, KML, GML, and GeoJSON support

New To Open Layers - http://trac.osgeo.org/openlayers/wiki/NewToOpenLayers
Source:
http://www.openlayers.org/
http://en.wikipedia.org/wiki/OpenLayers