The following is a list of external sites related to OpenLayers.
Visit the OpenLayers home page at http://openlayers.org.
Full documentation for OpenLayers is available at http://docs.openlayers.org, a great list of examples are available at http://openlayers.org/dev/examples/ and the API documentation is at http://dev.openlayers.org/apidocs/.
OpenLayers has an active users mailing list, which you can subscribe to at http://lists.osgeo.org/mailman/listinfo/openlayers-users. If you’re a developer, you can subscribe to the developer list at http://lists.osgeo.org/mailman/listinfo/openlayers-dev.
OpenLayers is maintained on a GitHub repo, issues for OpenLayers 2 branch should be reported at https://github.com/openlayers/openlayers/issues.
Join a live discussion at #openlayers, on irc.freenode.net.
Boundless helps to develop OpenLayers and funds development through its OpenGeo Suite. Learn more at http://boundless.com.
Prodevelop does consultancy and integrates free software for geomatics like OpenLayers. It’s also an official OpenGeo partner in Spain. Learn more at http://wwww.prodevelop.es/en.