Screenshotlayer - Screenshotlayer is a lighweight REST API built to deliver PNG, JPEG & GIF website screenshots at unparalleled speeds.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
LICEcap - A straightforward, high performance application that enables users to capture a portion of the desktop and save it to . GIF or . LCF, LICEcap is available for download as a GPL free software.
Website Informer - Website.informer: complete data lookup & free aggregated report on any domain including whois, visitors, IP & DNS details, competitors, owners, etc
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Site Rank Data - View historical rank information of websites via time series charts.