Furman links:

Furman
Furman Music

International Trumpet Guild:

ITG

Trumpet forums:

Trumpet Herald
Trumpet Master

Instrument makers:

Schilke Trumpets
Edwards Trumpets
Bach Trumpets
Yamaha Trumpets
Monette Trumpets

Mouthpiece makers:

GR Technologies
Curry
Bob Reeves
Stork Custom
Monette

Instrument cases:

Wiseman Cases
Torpedo Bags
Protec Cases
Reunion Blues

Greek links:

Phi Mu Alpha Sinfonia - Men's Music Fraternity
Sigma Alpha Iota - Women's Music Fraternity