Ilec GmbH
Ilec Instruments
http://www.ilec-gmbh.com/

Borgelt Instruments
Manufacturing variometers and flight computers.
http://www.borgeltinstruments.com/

Tasman Instruments
flight instruments and accessories for gliders, sailplanes, ultralight aircraft and recreational vechicles,
http://www.tasmaninstruments.com.au/

Ball Variometers, Inc.
Blue Sky Avionics, LLC is a manufacturer of modern and low cost instruments for sport aviation.
http://www.ballvarios.com/

Tasman Instruments
flight instruments and accessories for gliders, sailplanes, ultralight aircraft and recreational vechicles,
http://www.tasmaninstruments.com.au/

Filser Electronic GmbH
Designers and manufacturers of VHF radios, electronic variometers with GPS Receivers and integrated glideslope calculators.
http://www.filser.de/