Elements for Sketch - High-quality UI Kits in Sketch, for free
UI Garage - Specific mobile and web design patterns for your inspiration
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Muzli - UI/UX and Design Inspiration Chrome Extension
DynaMaker - Cloud service for Visual Product Configuration with parametric geometry and CAD / BIM
Design Hunt - Curated design inspiration for everyone