Sketchucation - Sketchucation is a 3D SketchUp Community for students, professionals, designers, and hobbyists.
CGTrader - CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.
CGTips - CGTips is a 3D Architectural Visualization learning platform for Architects or interior designers to build their skills in an interactive way.
RigModels.com - Free 3D Search Engine. Explore & download 3d models for free. Rig & Animate static models easily.
Poly Haven - Poly Haven (formerly known as Texture Haven) is an online website where you will find scanned textures without any cost and that are of high quality.
3DOcean - 3D Models & Accessories From $1 for 3D Models, Textures, Materials & Shaders, 2D Concepts...