Full Page Screen Capture - I built a Chrome Extension that allows you to save a screenshot of an entire webpage as an image
Shottr - Shottr is a free macOS screenshot app with scrolling screenshots, OCR, annotation and measurement instruments.
GoFullPage - GoFullPage is an all-in-one browser extension for Chromium, Firefox, Opera, and Chrome that lets you capture screenshots for page layouts.
Microlink screenshot - Take a screenshot of any website
NextUX Visual Editor - Easy-to-use iteration app for non-designers
U-Eyes: Mobile Device Simulator - A Chrome extension for simulating and capture mobile view