Open Source Solid Modeling CAD
BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
ChessDB is a free open-source chess database for Windows, Linux, Mac OSX and most UNIX and UNIX-like operating systems. ChessDB is based on code from Scid http://scid.sourceforge.net/ - a project for which there have been no updates for several years. In
Tcl binding to VISA API
Tcl binding to VISA (Virtual Instrument Software Architecture) API. It is linked to Tcl as a standard extension following Tcl Extension Architecture (TEA) conventions. See VISA specs. on IVI Foundation page: http://www.ivifoundation.org/specifications/default.aspx TEA specs. can be found here: http://www.tcl.tk/doc/tea/
A combination of useful tools for High School classes, including math classes ranging from prealgebra to calculus, and science classes ranging from IPS to AP Physics.
XmdTk is a Perl Tkx abstraction library that aims to provide cross platform, intuitive, object oriented approach to building graphical user interfaces from code and preconfigured XML files.