Xnapper - Take beautiful screenshots instantly
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Screenshots Pro - Screenshots Pro is an app screenshot maker that helps you create a beautiful presentation of your app on App Store and Google Play.
Thum.io - A real-time website screenshot generator
App Screenshot Generator - A 100% free tool for creating app store screenshots
Blink - Blink is a team and employee app, with a Feed, Chat and Hub (for documents, links, files).