CGTrader - CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.
Cargo - Cargo Collective is a web publishing platform that creates and offers accessible tools online.
3DOcean - 3D Models & Accessories From $1 for 3D Models, Textures, Materials & Shaders, 2D Concepts...
Crevado - Crevado makes it super-easy to create your online & mobile portfolio website.
TurboSquid - TurboSquid offers 3D models for professionals.
ICON6 - Icon6 is a tool to easily create a professional online portfolio website.