Full Page Screen Capture - I built a Chrome Extension that allows you to save a screenshot of an entire webpage as an image
Geekflare Screenshot API - Take a full page screenshot of any site from multiple locations whether it be via desktop, mobile or tablet
GoFullPage - GoFullPage is an all-in-one browser extension for Chromium, Firefox, Opera, and Chrome that lets you capture screenshots for page layouts.
Enpose - The simple screenshot bot
NextUX Visual Editor - Easy-to-use iteration app for non-designers
Screenshot Tracker - Capture and keep track of full-sized web page screenshots