Airmaster Propellers Ltd  Manufacturer of variable pitch constant speed propellers for light or experimental aircraft.

Hamilton Standard

Hartzell Propeller Inc.  Information and product support.

Ivan James: Composite construction & fabrication  A constructor and fabricator of aircraft propellers, airplanes, and other non-aviation items.  Propellers for hovercrafts, ultra-lites, home-builts, wind fans, backpack powered parachutes.  All propellers are hand-carved from Amazonian Purple Heart hardwood.

Ivoprop

P-Prop  Hand crafted wood and composite propellers for homebuilt and microlight aircraft.

Powerfin Inc.  Composite aircraft propellers.

Precision Propellers LLC  Props up to 130 HP with two to six blades.

Smiths Aerospace  An aerospace equipment company with businesses that focus on: engine systems, flight control systems, landing gear and hydraulic systems, electromechanical systems, and propeller systems.

Tennessee Propellers, Inc.  Manufacturer of two blade fixed-pitch propellers for ultralights, powered parachutes, and gyrocopters.

ULflight.com  Do-it-yourself and digital propeller balancers for ultralight and experimental aircraft.

Whirl Wind Propellers Corporation  Manufacturer of composit constant speed propellers for high performance aircraft, as well as UAV's.