OpenLayers

TwitterFacebook
Get flash to fully experience Pearltrees
http://www.microsoft.com/maps/developers/web.aspx

Bing Maps Developer Resources: Map SDKs, APIs, Tips, Training

Bing Maps gives you a rich set of tools to help you create amazing map experiences. Choose from our super fast AJAX Control 7.0, our REST Services API, our Bing Map App SDK for mash-ups hosted on Bing.com/maps , and our Windows Phone 7 SDK to find the solution that is right for you.

Maps Web Services

We are shutting down this service. http://developer.yahoo.com/maps/

OpenLayers Simple Example

http://wiki.openstreetmap.org/wiki/OpenLayers_Simple_Example Deploy an OpenStreetMap slippymap on my own website