Create mockups online | Artboard Studio
Device Shots — Screenshot Device Mockup Generator
Diagramly - Draw Diagrams Online
Frame Box - Lightweight online tool for creating mockups
Free Mockup Generator
Gravit
MockingBot - The Missing Prototyping Tool For Mobile
Mockup for iPhone 12 Pro Pacific Blue
Mokup Frames - Create Dribbble-ready GIFs in one click
Penpot - Design Freedom for Teams
Trunk Version Management Software For Designers
Wirify – The web as wireframes
Zeplin