What are some alternatives?
When comparing snaggy and Skitch, you can also consider the following products
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
LightShot - The fastest way to take a customizable screenshot.
Snagit - Screen Capture Software for Windows and Mac
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.