SkyLight Gallery, Camera and Lenses

Alpa, very precise and very strange looking. Visit just to take a look!
Bender Photographic Inc., maker of Large Format camera kits. There's also view camera guides you can purchase online.
Brightscreen
Broncia
Canon USA where you can go right to product information for cameras and lenses. There's also a wide selection of manuals and books you can buy for various models.
Contax
Exakta's Collector's Corner
Graflex.Org, dedicated to promoting the use and preservation of Graflex Speed Graphics and other classic cameras.
Fuji
Hasselblad in Sweden or the US mirror. If it's a reference volume you're looking for try The Hasselblad Manual.
Ikelite Underwater Systems
Kodak cameras and film. There's also a Collector's Guide for classic Kodak cameras.
Konica
Leica USA or Leica. If you're trying to identify a body from the attic or are interested in the M series there's several books that can be very helpful.
Leica Historical Society of America
Linhof information from Brazil and view camera guides from the US that you can purchase online.
Mamiya and manuals for the Twins Lens Reflex system.
Metz in both English and deutsch.
Minolta web site or manuals from the most recent models to the classics.
Minox in both English and deutsch.
Nikon USA, Manuals and guides for many models, flashes and the Nikonos system.
Nikon Japan
F5 from Moose Peterson
F4
F3
F2
F

Olympus, including 3rd party manuals.
The Pentax web site and manuals. you can buy online.
Pentax Collector's Page courtesy of Fred Sherfy.
Ricoh
Rollei Interest Group, also a book about Rollei TLR history.
Schneider Optics
Seitz digital cameras. You've got to see them to believe it.
Sekonic
Sinar Bron, or view camera guides you can purchase online.
Tamron lenses
Toyo
Vivitar camera's and lenses.
Yashica
Wisner Classic Manufacturing Co., makers of Large Format cameras. View camera guides you can purchase online.
Carl Zeiss

Filters and accessories

Anvil cases, custom made and tough as heck.

Rosco Laboratories, for filters and much more!
Photoflex Lighting equipment for still, video and digital photography: Lights, reflectors, diffusers, softboxes and studio accessories; background screens for TV/digital applications
Tenba bags
Zero Halliburton