Links

ScaleArt - Manufacturer of trucks in scale 1:14.5.
Brand-Modellbau - Accessories for trucks.
Wedico - Manufacturer of trucks in scale 1:16.
Leimbach - Construction machines.
Servonaut - Speedcontrolers, sound module.
TTM, Thiel-Truck-Modellbau - Reseller for different brands. Also some photos.
Wendscher Modellbau - Manufactures and sells trailers, containers and accessories.
minipaletten.de - Goods and cargo.
Modelltruckteile - Sells parts and accessories from several different manufacturers.
Seiffert Design - Signs and decor.
GEWU Electronic - Electronics.

Modelltruck.net - Das forum - Forum. Also many pictures in the postings.
RC Glashaus - A place for driving your truck. Many pictures.
RC Modeltruck - A Danish forum.
RC TruckTeam Sjælland - The Danish version of RC Glashaus.
TRUCKS & Details - A German magazine with articles, reports and great pictures.

Lastbilsfoton.se - Pictures of real trucks.
LEGO Trucks - Awesome trucks made up of LEGO!
Fordonshistoriska Lastvagnsarkivet - Models made in carboard!
LEGO Trucks & Cranes - Projects made in LEGO, and then torn down again.
Volvofan - Lots of detailed pictures of Volvo trucks.
R/C Steam Hauler - A guy that has built a steam powered truck.