PagePeeker - PagePeeker enables users to generates screenshots and thumbnails from web pages.
thumbalizr - Embed thumbnails of any web page. use Thumbalzir to add a screenshot of thumbnail of any URL on your web site or e-mail.
Capture by Techulus - The ultimate toolkit for converting HTML to image & PDF. Pay only for what you need.No Subscription.
Screenshot Machine - Screenshot machine is an online website capturing service. Creates a screenshot or thumbnail of any online web page in couple of seconds for free.
ShrinkTheWeb - ShrinkTheWeb is an automated website screenshots thumbnail preview generator service for webmasters and developers.
CrossBrowserTesting - Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.