IBS is prepaid billing system for ISPs. It supports VoIP, dialup, LAN prepaid authentication, and call detail recording. It can work with Cisco, Quintum, Portslave, PPPd, Win2k, GnuGK, MVTS, Elacs800, and Portmaster Rases.
An SRS email address rewriting engine.
A proxy DNS server with permanent cache for dial-up systems and small networks.