CNC Zone –Active CNC forum. Tons of great people and info.
Welding Web -Welding forum. Really supportive and knowledgeable group of folks.
CandCNC -Comprehensive electronics kits: motor/controller/power supply/torch height control
Shop Droids-Gantry Kits
Blender-Open Source 3d modeling software
Blender Guru-High quality Blender tutorials
Blender Cookie-High quality Blender tutorials
McMaster Carr-The online hardware store