xtalk is a multi-user IM/chat room system. It can be used to chat with other people within a colourful yet minimalistic command-oriented client.
IPNetwork is a set of utility classes for the .NET platform that take care of complex calculations related to networks, IP, netmask, CIDR, subnets, and supernets. It works with IPv4, has a light and clean API, and is fully unit tested.
A daemon for dynamic routing of IP and IPv6
Lets you view several files at once in a window, with colors.