99designs - The #1 marketplace for graphic design, including logo design, web design and other design contests. Start a contest now with 100% Money-Back Guarantee!
ShapeShop - ShapeShop is an advanced and professional 3D design and modeling application that comes with an easy-to-use and user-friendly interface.
DesignCrowd - Get the Perfect Custom Design, Every Time With the world's #1 custom design marketplace
Sculptris - Sculptris: Enter a world of digital art without barriers.
Fiverr - One marketplace, millions of professional services.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.