Screenshot Tracker - Capture and keep track of full-sized web page screenshots
Justinmind - Define awesome experiences through wireframes & prototypes.
Webshot - Free and Open Source screenshot website service
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Screenstab - A tool to turn ordinary screenshots into beautiful image assets
avocode - Centralize design collaboration, version control, prototyping, feedback, and developer hand-off with Avocode. Work on any design, anywhere, with anyone. Sign up free 👉 https://avocode.com/.