LostGeometry.xyz - Huge set of 91 abstract 3D objects in various styles.
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Womp - 3D Made Easy
Craftwork - A collection of User Interface resources made by Craftwork
Spline - Design tool for 3d web experiences
Iconscout - Design Resource Marketplace.