ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Flickr - image and video hosting website
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
LightShot - The fastest way to take a customizable screenshot.
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.