Diamond Wire Technology
Manufacturer of diamond wire and saws for dicing, wafering and multi-wire cutting. Company claims to be the oldest. Site is very informative and well designed.
http://www.diamondwiretech.com

Tool Avenue
Diamond blades, tile saws, concrete saws, diamond core bits, and various accessories.
http://www.toolavenue.com/

Sawing Systems Inc.
The Stone and Concrete Industries' Source for Quality Sawing, Shaping and Polishing Equipment.
http://www.sawingsystems.com/

Barrett Diamond Products, Inc.
Barrett Diamond Products, Inc. manufacturing a complete line of quality diamond tools for over forty years.
http://www.barrettdiamond.com/

Diamond Wire-Die Co.
India. Manufactures natural and polycrystalline diamond dies and wire guides for EDM wire cut machines. Able to supply dies against customer drawings.
http://business.vsnl.com/dwd

Diamond Discs Direct Ltd.
Diamond Discs Direct - Suppliers of diamond blades, diamond core drills and machinery. Our combined range of cutting tools not only provides everything the professional contractor requires, but more importantly offers speed of cut and lifetime that we guarantee are at least as good, if not better than any other manufacturer you have used. We supply products from DDD, Hilbor, Tyrolit, Marcrist Diamant Boart and Norton.
http://www.diamonddiscs.com/

Patriot Diamond Inc
diamond blades, diamond blade, diamond saw blade, diamond saw blades, diamond wire
http://www.corebits.net/

Dianamic Abrasive Products Inc.
Manufacture, Wholesale and Retail of Diamond and Carbide Draw Dies used to size and draw wire, including dies, transfer fingers, wire sizing rings and diamond powder used to fine size wire. Reclamation service for used diamond powder. Resizing and Polishing service of diamond draw and carbide draw dies.
http://www.dianamic.com/

Sanders Saws, Inc
Manufacture a wide range of diamond saws and cutting tools .
http://www.sanderssaws.com

Interholz Raimann GmbH
Germany. Gang rip saws, selective rip saws, optimizing saws, double arbor saws, length cutting saws, cross cutting saws / pendulum saws, veneer defecters and patchers.
http://www.raimann.com/