LINK to a very extensive GPS Manufacturer's listing for both hardware and software

In addition these URL addresses following are for  companys who manufacture GPS receivers.  There is considerable duplication with the University of New Brunswick listings above.

www.absolutetime.com Absolute Time Corp
www.advento.se  Advento AB
www.airdata.ca  Air Data Inc
www.aoa-gps.com  Allen Osborne Associates Inc
www.alliedsignal.com AlliedSignal Electronic & Avionic Systems
www.americangnc.com American GNC Corporation
www.ashtech.com  Ashtech Inc
www.marconi.ca  Canadian Marconi Company, GPS-OEM Group
www.csi-dgps.com Communication Systems International (CSI)
www.cmtinc.com  Corvallis Microtechnology Inc
www.datum.com  Datum Inc / GmbH
www.onramp.net/del-norte Del Norte Technology Inc
furunousa.com  Furuno Electric Co Ltd
www.garmin.com  GARMIN International
www.gpsemi.com  GEC Plessey Semiconductors
georesearch.com  GeoResearch Inc
www.iechome.com  Interstate Electronics Corporation
www.grcc.com  JRC Canada Inc
netlaputa.or.jp  Koden Electronics Co Ltd
www.leica.com  Leica Geosystems AB GPS / Leica Geosystems Inc GPS
www.lowrance.com Lowrance Electronics Inc
www.u-blox.ch  u-blox AG, Switzerland
www.magellangps.com Magellan Systems Corp
mayflower.com  Mayflower Communications Co Inc
www.mitac.com.tw Mitac Inc (I thought these guys only make PC clones!)
www.oncore.motorola.com Motorola Inc
www.mot.com  /GSS/SSTG/SATCOM/GSSD  Motorola Space and Systems
Technology         (SSTG)
wwww.telecom.com/navstar Navstar Systems Ltd
www.novatel.ca  NovAtel Inc
www.silva.se  Silva Sweden AB
www.sirf.com  SiRF Technology Inc
www.si-tex.com  SiTex Marine Electronics Inc
www.skyforce.co.uk Skyforce Avionics
www.sokkia.com  Sokkia Corporation
ssd.loral.com  Space Systems / Loral
www.spectraprecision.com Spectra Precision AB, Sweden / Spectra
www.spintime.com Spectrum Geophysical Instruments
www.starlinkdgps.com Starlink Incorporated
tekelec-temex.com Tekelec Temex, France
www.3Snavigation.com 3S Navigation
www.trak.com  TRAK Systems
www.trimble.com  Trimble Navigation Limited
www.truetime.com TrueTime Inc
www.usac.com  Universal Avionics Systems Corporation
www.vistacc.com  Vista Controls Corp
www.vtechrf.com  Vtech Wireless Inc