Full Page Screen Capture - I built a Chrome Extension that allows you to save a screenshot of an entire webpage as an image
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Screenshot Bin - Generate website screenshots and thumbnails at scale, right from your app. Screenshots as a service.
Thum.io - A real-time website screenshot generator
Screenshot Tracker - Capture and keep track of full-sized web page screenshots
ScreenTray - A better way to capture, annotate and share screenshots