Screenshot Tracker - Capture and keep track of full-sized web page screenshots
Mockups Design - Mockups Design is the most leading web-based application that comes with a vast collection of creatively design mockups for all kinds of products and devices.
Webshot - Free and Open Source screenshot website service
Pixeden - Pixeden is an all-in-one premium design and web resources platform that provides high-quality graphic design templates and lots of other files.
Screenstab - A tool to turn ordinary screenshots into beautiful image assets
Mr. Mockup - Mr.