CGTrader - CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.
Crevado - Crevado makes it super-easy to create your online & mobile portfolio website.
3DExport - 3DExport is a 3D model marketplace where you can buy and sell 3D models, CG textures and digital objects for 3D printing with royalty free. Professional 3D models - 3DExport.com
Cargo - Cargo Collective is a web publishing platform that creates and offers accessible tools online.
TurboSquid - TurboSquid offers 3D models for professionals.
ICON6 - Icon6 is a tool to easily create a professional online portfolio website.