Computer Algebra System written in Common Lisp
Chess Database and Toolkit program
Cross-platform, scientific graphics plotting library
Img is a collection of format handlers for the Tk photo image type.
Platform-agnostic GUI supporting CVS, Subversion, Git, and RCS
Earth orbits and satellite coverage display in 3D on your laptop.
Schematic circuit editor for VLSI and Mixed mode circuit simulation.
Doing 3D with Tcl
Implementation of Tcl for the CLR.
A powerful editor and graphical debugger for code written in Scilab