Sketchucation - Sketchucation is a 3D SketchUp Community for students, professionals, designers, and hobbyists.

3dxo.com - 3dxo.com is a great place for both professionals and hobbyists to find some really cool, free 3D models.

TheSketchupEssentials - TheSketchupEssentials is a community to get SkethuUp tutorials and help from professionals.

3Dmdb - 3Dmdb is a search engine-based hub of multiple three-dimensional colorful objects which can be downloaded, purchased, and rendered from shops or marketplaces.

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.

LugherTexture - LugherTexture is an online resource for stunning, high-resolution textures and graphics.