MapServer
MapServer was originally developed by the University of Minnesota (UMN). MapServer is now a project of OSGeo, and is maintained by a growing number of developers (nearing 20) from around the world. MapServer is not a full-featured GIS system, nor does it aspire to be. Instead, MapServer excels at rendering spatial data (maps, images, and vector data) for the web.
link : http://mapserver.gis.umn.edu/
We have developed a flash map viewer for MapServer. It is now used by two real state company check the following links
This viewer is a open source viewer and the source can be downloaded with the following instruction
svn co https://hawaritmsviewer.svn.sourceforge.net/svnroot/hawaritmsviewer hawaritmsviewer
If there is any question regarding the viewer you know were to find me.
The following site lists several webtesting tools seems very use full
http://www.softwareqatest.com/qatweb1.html
