I'm writing an essay about web mapping software and I can't find out is Orbit EOS Lite Free GIS Map Server an OpenSource software or not? Also, I would be thankful if someone gives me some links with some list of web mapping programs. Thank you.
A List of 'OpenSource' GIS & WebMap Servers
Recommend Geoserver 2.1 http://geoserver.org/display/GEOS/Stable