Virtualmin is a Webmin module that simplifies the process of setting up and managing virtual servers. It can create Apache virtual hosts, BIND DNS domains, MySQL and PostgreSQL databases, and set up Sendmail or Postfix to accept email for a domain. It can also manage mailboxes and mail aliases within a domain.
Usermin is a Web interface that can be used by any user on a UNIX system to easily perform tasks like reading mail, setting up SSH, or configuring mail forwarding. It can be thought of as a simplified version of Webmin designed for use by normal users rather than system administrators.
Spacewalk is a Linux and Solaris systems management solution. It allows you to inventory your systems (hardware and software information), install and update software on your systems, collect and distribute your custom software packages into manageable groups, provision (Kickstart) your systems, manage and deploy configuration files to your systems, monitor your systems, provision virtual guests, and start/stop/configure virtual guests.
RadiusReport can analyse the logfiles produced by all the major Radius Servers including Livingston Radius V2.0+, V1.16, Merit Radius, Ascend Radius, Dale Reed's RadiusNT, Radiator Perl Radius Server, but excluding Microsoft Radius. It will allow you to produce many, varied, types of reports from one or multiple radius log files.