Manufacturers

There are so many tent manufacturers that it would be impossible to list them all. This list is a little Australian centric, but will become more international over time.

I am thinking of including the following (if I ever get time):

Manufacturer Country Website Tent range that includes...
ALPS Mountaineering    http://www.alpsmountaineering.com/ Lightweight, 2, 3-season and camping tents
Big Agnes USA  http://www.bigagnes.com/ Ultralight, 2, 3, 4-season and expedition tents
Black Diamond USA (Utah)  http://blackdiamondequipment.com/    4-season tents
Blackwolf Australia  http://www.blackwolf.com.au/ Family (car) camping tents
Brooks-Range USA (California)  http://www.brooks-range.com/ Specialist mountaineering tents 
Canvas Camp Belgium  http://www.canvascamp.com/ Canvas bell tents
Coleman USA    http://www.coleman.com/ Family and hiking tents 
Eureka! USA (NY)  http://www.eurekatent.com/ Large range of tents 
Exped Switzerland  http://www.exped.com/ 3, 4-season and expedition tents
Hilleberg Sweden  http://www.hilleberg.com/ 3, 4-season and expedition tents 
Karrimor UK   http://www.karrimor.com/  Bivi Bags
Macpac Originally NZ, now owned by UK company     http://www.macpac.com.au/ Alpine, trekking and camping tents 
Marmot USA (Colorado)  http://marmot.com/ 2, 3, 4-season tents
Mont Australia  http://www.mont.com.au/ 3, 4-season tents, tarps and biivies
Mountain Hardwear USA (California)   http://www.mountainhardwear.com/ 2, 3, 4-season and expedition tents
MSR (Cascade designs) USA (Washington)  http://www.cascadedesigns.com/ Tarps, 2, 3, 4-season and expedition tents 
NEMO UK  http://www.nemoequipment.com/ Ultralight, camping and backpacking tents
Outdoor Expedition Australia  Via retailers only  Hiking tents
Rab UK  http://rab.equipment/ww/ Mountaineering bivi tents
REI USA  http://www.rei.com/ 2, 3, 4-season tents 
Salewa Originally Germany now Italy  http://www.salewa.com/ 2, 3, 4-season and expedition tents
Sierra Designs USA (Colorado)  http://www.sierradesigns.com/ Ultralight, 2, 3, 4-season backpacking tents
Six Moon Designs USA (Oregon)  https://www.sixmoondesigns.com/ Tarps and ultralight backpacking tents
Tarptent USA (California)  https://www.tarptent.com/ Lightweight innovative tents 
Terra Nova UK  http://www.terra-nova.co.uk/ Ultralight, 2, 3, 4-season and expedition tents
The North Face USA (California)  https://thenorthface.com.au/ 3, 4-season and expedition tents 
Vango UK  http://www.vango.co.uk/ Family (car) camping tents
Wilderness Equipment Australia   http://wildernessequipment.com.au/ Tarps, ultralight, 3, 4-season tents

This list is far from complete, but I estimate that this represents well over 95% of the tents sold in Australia!

Not so sure about other countries. Watch this space to see who gets added!

Other tent-related gear

Keeping the focus on tents, other stuff that you will need with a tent includes: 

Manufacturer  Country  Website  What 
Orange Screw  USA  http://www.orangescrew.com Tent pegs