ARI - field equipment

Archaeological trowels (UK): http://www.getatrowel.co.uk/
Archaeology Excavation Shelter Tents (USA): http://www.shelter-systems.com/archeology.html
Archaeology Store (USA): http://www.archaeologystore.com/
catsco.org.uk (UK - formerly Cotswold Archaeological Tools and Services): http://catsco.org.uk/
Cultural Resource Technologies (USA): http://www.crtechnologies.net/
Forestry Suppliers Inc. (USA): http://www.forestry-suppliers.com/
IFRAO photographic scales (Italy): http://www.cesmap.it/ifrao/scale.html
Munsell Books and Publications (USA): http://qcqa.com/category_b.asp?subPID=152
Munsell Soil Color Charts (USA): http://www.dgcolour.co.uk/specialist-charts-b004-soil-color-charts.htm
Strati-Concept (France): http://www.strati-concept.com/

your major tool type !