Ruby-Newton is a Ruby wrapper for the NewtonGameDynamics physics engine ( http://newtondynamics.com/ ) It brings object-oriented real-time animated physics simulations to Ruby-enabled applications (e.g. 3D modeling tool with interactive scripting support
A GTK+ MUD client with support for MCCP, MXP, support for the zChat and MudMaster peer-to-peer chat protocols, the MUD sound protocol (MSP), Telnet GA support, regexp trigger support, aliases, Perl and Python plugin support.