JSLibs
Standalone JavaScript development environment; goal: turn JavaScript into a general-purpose scripting language. Has set of native modules that contain many general-purpose classes and functions. Open source, GPL.
http://code.google.com/p/jslibs/

Chambers Electronics
People Counters by Chambers Electronics
http://www.chambers-electronics.com/

GEMPACK
(General Equilibrium Modelling PACKage) is a suite of general-purpose economic modelling software especially suitable for general and partial equilibrium models.
http://www.monash.edu.au/policy/gpinfo.htm

QuickCD
General-purpose collision detection library, capable of handling general polygon soups. Based on hierarchies of bounding volumes of discrete-orientation polytopes. Free source for noncommercial use.
http://www.ams.sunysb.edu/~jklosow/quickcd/QuickCD.html

DPlot
DPlot Graph Software for Scientists and Engineers.
http://www.dplot.com/

The Genesis of MUMPS and MUG
Story of the creation of the language at The Massachusetts General Hospital, and its development into a procedural, interpreted general-purpose language, oriented toward database use. By Glen Steinbach.
http://207.192.157.194/MDC/genesis.htm

The Crispen Family
The Crispen Family: Free Software
http://www.crispen.org/src/

Far West Technology
Ion chambers, gas single wire counters, GM counters, gas filling systems.
http://www.fwt.com/detector/prod_det.htm

Redington Counters, Inc.
Redington is a manufacturer of Counters, Hour Meters, Indicators and Controllers using innovative design and state of the art technology.
http://www.redingtoncounters.com

Laboratory Technologies, Inc.
Manufacturer of gamma counters, wipe test counters, and radioactive sample analyzers.
http://www.labtechinc.com/