Greers Ferry Glass Works
- Scientific glassware such as hydrometers, thermometers, viscometers, centrifuge tubes and refractometers. Custom and off-the-shelf designs.
- http://www.gfglass.com/

Genser Company
- A manufacturer that produces: technical, rotary evaporators, extraction systems, vacuum pumps, vacuum controllers and sodium presses.
- http://www.rotary-evaporator.com/

GENEQ inc
- Scientific instruments distributor. Products for materials testing, the environment, meteorology, geomatics and biotechnology.
- http://www.geneq.com/

Glas-Col
- Laboratory stirring, heating,mixing,vortexing,and shaking. Combinatorial, pulse or no pulse vortexing with or without heat.
- http://www.glascol.com/

Genevac
- Manufacturer of equipment for drug discovery, combinatorial chemistry, centrifugal concentration, gel drying, rotary evaporation, de-gassing, freeze drying, vacuum ovens, vacuum filtration, acid chloride distillations.
- http://www.genevac.co.uk/index.html