General:
EAA - Experimental Aircraft Association
Van's aircraft - Van's Aircraft web
Instruments:
J.P. Instruments - aircraft engine data management systems
Aircraft Spruce & Specialty - One Source Everything for Airplanes (35,000 Products )
Blue Mountain Avionics - EFIS, Flight Control and Inertial Systems
Aircraft Extras - Great products for homebuilders
Avery Tools - RV builders tool kit
Cleaveland Tools - RV builders tool kit
stein air - Good products at great prices with super customer service
xtreme-products - RV-7/7a and 9/9a Center Consoles
kit-panels - Panels completely assembled and tested
advanced-control-systems - Advanced Flight Systems
Other Builders:
Mike Raviv - RV-7 Builder
Chris Heitman - RV-9 Builder (Some nice tricks and ideas)
Clay's RV9A Web Site - RV-9A Builder
Smitty - Texas - RV-9A Builder
Matthew & Sandi's - RV-9A Builders Log
Mike Schipper - Texas - RV-9A Builders Log
Ilan Perry - Israel - RV-7 Builder
Yair Gill - COZY MKIV Builder
Dan's RV Project - RV Builder
Andy Karmy - RV-9A Builder