Fae - Design in Figma, publish as a React component via npm
Invision - Prototyping and collaboration for design teams
UI Flow Cards - Construct web pages with ease, using cards
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Wannathis - 3d illustrations and freebies
Craftwork - A collection of User Interface resources made by Craftwork