The following is a list of the underlying technology for OGP. We also have a new Amazon Machine Image (AMI) available for easy implementation
Linux
Apache/Tomcat
Java
JSP
JavaScript
Solr/Lucene
OpenLayers
JQuery with DataTables
GeoServer, but compatible with ArcGIS Server
GeoWebCache
TileMill
Database Management System: OGP is database independent. It can work with most any DBMS or simply flat files on a file server.