FogFactory.com
FogFactory is a one-stop web site selling most any kind of fog/smoke/haze machine on the planet, including specialty items like bubble machines, snow machines, foam machines, and pyrotechnics.
http://www.fogfactory.com

Rosco Fog Machines
Fog and smoke machines for photographic film, theatrical, television, and live entertainment applications.
http://www.tallyns.com/

Smoke Cloak
Smokecloak from Martin Security, tågesikring
http://www.smokecloak.com/

MDG Fog Generators Ltd.
Canadian manufacturer of fog, smoke and haze machines.
http://www.mdgfog.com/

Swefog Professional AB
SWEFOG HAZERS, SMOKE MACHINES, FLUIDS & SPECIAL EFFECTS FOR THEATRE, STAGE LIGHTING & ENTERTAINMENT INDUSTRY
http://www.swefog.com/

Smoke Control Services Limited
Smoke Control Services specialise in smoke control systems for multi-occupancy residential buildings providing packaged solutions designed to comply with building regulations simply and efficiently.
http://www.smokecontrol.co.uk

Smoke Rite Ovens
Complete range of Australian made smoking ovens that can smoke, roast, cook, bake and steam.
http://www.smokeriteovens.com.au

Smoke in C4D
Offers examples and tutorial information on how to use visible lights to make wispy, smoky smoke in C4D.
http://www.technoscope.com/c4d/smoke.html

Convection in a box.
Experiments with smoke inside a plexiglass box challenge convectional wisdom. Smoke can unexpectedly act heavier than air and then spontaneously reverse.
http://www.synapse9.com/airbox.htm

Concept Smoke Systems
Portable fog machines for security systems, testing applications and pyrotechnic effects. Non toxic water and oil based smoke machines from Concept Smoke
http://www.concept-smoke.co.uk/