Longs Motor (chinese)

Cheap electronics from a reputable ebay store

VXB ball bearings

Large assortment of ball bearings

Probotix

CNC Routers, 3D Printers, & CNC Stepper Motor Control Systems

Vectric

Vectric software is designed to make cutting parts on a CNC an enjoyable and productive experience

CNC Zone

• CNCzone.com-CNC Machines, CadCam ,Classifieds, Metalworking,Woodworking

Kaman Direct

Industrial Technologies 

Spark Fun

all kinds of gizmos

Pololu

drivers and allot of other things