Midwest Engineering and Design
Sell plans for such items as underwater camcorder housings, 1 and 2 person submarines, hydrophones, ultralight aircraft, scuba tow scooters, and pulse induction metal detector.

Affordable Submersible Products
Plans for an underwater video camera housing, lights, and a waterproof keychain laser pointer by Gary Dagastine.

Scuba Tow
Build it yourself diver propulsion vehicles (DPV) plans for the scuba tow and a one man submarine.

Scuba - do it yourself
Reinhard Kopka's site dedicated to homemade diving equipment and accessories. Plans range from lights and dive computer interfaces to diver propulsion vehicles and rebreathers.

Lee Engineering
Plans for the 'Picture Toob' underwater camcorder housing developed by an engineer who enjoys water activities.

BassCam
Sells plans for building your own underwater video camera system.

Padicam Video Housing
Plans for building your own underwater camcorder housing for under $100! NOTE: E-mail correspondence only.

Lunkercam Underwater Video Camera
Build your own underwater video camera for less than $125.

Elfmun Underwater Products
Offers plans, parts, and kits to build underwater canister dive lights and video housings. Includes ordering information, price lists, and contact details.

SLR Camera Housing Plans
Includes detailed description and pictures, along with price list for suggested parts and contact information.