Sipcalc is an advanced console-based IP subnet calculator. It can take multiple forms of input (IPv4/IPv6/interface/hostname) and output a multitude of information about a given subnet.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
There are lots of minor bugfixes. Command line argument handling has been improved. There is much improved IPv4/IPv6 DNS resolution. The CGI has gone on vacation; see the README for details.