The Software Testing Automation Framework (STAF) is a framework designed to improve the level of reuse and automation in test cases and test environments. The goal of STAF is to provide a complete end-to-end automation solution for testers.
Coccinella is a free and open-source cross-platform communication tool with a built-in whiteboard for improved collaboration with other people.
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/
ChemVisio is software which might be useful for educational purposes (non-organic chemistry, crystallography etc.). It might be a good visualization support for all people who need better illustrations than that you could see in books.
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.