I would like to introduce you to daloRADIUS.
is an advanced RADIUS web management application aimed at managing hotspots and general-purpose ISP deployments. It features user management, graphical reporting, accounting, a billing engine and integrates with GoogleMaps for geo-locating.
It is based on a FreeRADIUS deployment with a database server serving as the backend. Among other features it implements ACLs, GoogleMaps integration for locating hotspots/access points visually and many more features.
Project Page: http://sourceforge.net/projects/daloradius
Liran Tal <email@example.com>