Full Page Screen Capture - I built a Chrome Extension that allows you to save a screenshot of an entire webpage as an image
Webshot - Free and Open Source screenshot website service
Screenshot Bin - Generate website screenshots and thumbnails at scale, right from your app. Screenshots as a service.
Enpose - The simple screenshot bot
CloudBrowser.co - A supremely flexible and reliable HTTP API that supports professionals and enterprise alike in the...
Screenshot Tracker - Capture and keep track of full-sized web page screenshots