UIHut has a new plugin available on Figma, the popular design tool. Using Figma plugin users can copy any design on the clipboard and paste it into their Figma file. Cheers and save 10x time.
Free Options
Launch Team
Dropbox Sign APIBuild eSignatures into your app with less work.
Promoted
Scalenut
Mock Mock 
Anania
Podgraph
Space Figma Design System and UI Kit