Aviation

Airplane T-Shirts
Dozens of multicolor designs covering general aviation, warbirds, homebuilts, ultralights, and helicopters.
http://www.airplanetshirts.com/

Aviation Gifts
A collection of simple slogan shirts aimed at aviators and their families.
http://www.aviation-giftshop.com/

Sophos Silk Screening
A collection of American military designs.
http://sophoswear.com/

TriStar
Offering aviation art from a variety of American airlines, past and present.
http://www.skyshirts.com/