Invision - Prototyping and collaboration for design teams
SocialSizes - Sketch templates for sharing images & videos on social media
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Social Templates Bundle for Instagram - Large bundle of 240 posts & stories templates for Instagram
Craftwork - A collection of User Interface resources made by Craftwork
Video Templates By VEED.IO - Professional & editable online video templates for social