UI Movement - The best UI design inspiration, daily
Invision - Prototyping and collaboration for design teams
UI Garage - Specific mobile and web design patterns for your inspiration
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
CodeMyUI - Handpicked code snippets you can use in your web projects
Craftwork - A collection of User Interface resources made by Craftwork