PRUNED   http://pruned.blogspot.com/

BLDGBLOG  http://bldgblog.blogspot.com/

LANDSCAPE & URBANISM  http://landscapeandurbanism.blogspot.com/

ARCHINECT    http://archinect.com

LAND 8 LOUNGE      www.land8lounge.com
 
 
 

CAD

CAD BLOCKS

CADMonkey  http://www.cadmonkey.com/

Cad Block Exchange  http://cben.net/
 
 

GIS

Berkeley/Penn Urban & Environmental Modeler's Datakit   http://www.dcrp.ced.berkeley.edu/research/footprint/
Consists of a series of viewable and downloadable ESRI shapefiles and grids describing many of the physical, administrative, transportation, demographic, economic, land use and land cover, and environmental characteristics of the 48 contiguous United States.

USGS Seamless  http://seamless.usgs.gov/
High resolution imagery for the US
 
 

TEXTURES

Free Seamless Textures  http://www.freeseamlesstextures.com/

Texture Forrest   http://textures.forrest.cz/

CG Textures  http://www.cgtextures.com/
 
 

IMAGES

FLICKR   http://www.flickr.com/