Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Webflow 3D Transforms - Build 3D interactions visually, without writing any code
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Tridiv - Web-based editor for creating 3D shapes in CSS
Platforma - Wireframe library of layouts and UI elements
iMeshup - Import, edit and share your 3D projects via web and mobile