Simon Fraser University
Underwater Research Laboratory (URL). Specializes in underwater studies in the areas of acoustics, sonar, autonomous underwater vehicles, column surveys, signal processing and target detection. Page lists projects and personnel.
http://www.ensc.sfu.ca/research/url/

Nautilus Underwater Systems
Provides SCUBA gear and accessories, onboard tank fill systems, medical supplies, underwater vehicles and training programs for yacht-based use in underwater exploration and recreation. Includes product descriptions and photos. Located in Fort Lauderdale, Florida, USA.
http://web.mac.com/nus2/NUS/

AUVSI Autonomous Underwater Vehicle Competition
The industry's leading resource for unmanned systems information.
http://www.auvsi.org/competitions/water.cfm

Underwater Systems Inc.
USI-CSG is an innovative underwater engineering firm specializing in the design and manufacturing of a wide range of environment proof electrical, optical and electro-optical , cable assemblies,Instruments,naval,equipment,sensors,switches. Our products are designed to withstand harsh environments such as deep ocean and down hole application and vary from micro-miniature high density to very high current, high voltage connectors.
http://www.underwatersystems.com/

Innerspace Exploration Team
Nonprofit organization specializing in side scan sonar services including drowing victim search and recovery.
http://www.innerspaceexploration.org

NSW
Manufactures underwater electrical and electro-mechanical cables. Applications include fibre-optic telecommunication links, dynamic cables for underwater remote operated vehicles (ROVs), geophysical, and oceanographic instrumentation.
http://www.nsw.com/

Novaray Underwater ROV
Underwater ROV (Remotely Operated Vehicle) Operates in high currents - maritime search and rescue, maritime port and ship security, underwater treasure salvage. All in one underwater rov
http://www.novaray.com

Lubell Labs Inc.
Lubell Labs offers underwater speakers, underwater loudspeakers, underwater acoustic transducers, diver recall systems, synchronized swimming sound systems, amplifiers, analog and digital recorders, wired and wireless microphones, sound reproduction equipment, and complete air and underwater sound systems.
http://www.lubell.com/

Outland Technology Inc.
Underwater Video Systems, Imaging, annotation, Video cameras,commercial diving, remotely operated vehicles
http://www.outlandtech.com/

D.S. Co. Ltd.
Ukraine manufacturer of ship demagnetization equipment, electrophysical processing of materials and unmanned underwater vehicles.
http://www.ds.mksat.net