Earth orbits and satellite coverage display in 3D on your laptop.
Implementation of Tcl for the CLR.
Doing 3D with Tcl
Convenience sockets library for GNU/Linux
Next Scripting Framework (NSF)
SHA utilities for Tcl
Numerical mathematics platform, Matlab alternative
Open Source Solid Modeling CAD
Analysis and display of Census, business, government attribute data
Typed Arrays for Tcl