Lightshot is a free Chrome addon that captures any screen image with ease. I find it better than the Snip Tool of Windows 7 because it’s right there on your browser. No extra program to load. Also you can crop the image before saving it. The new beta version of snip in Windows 10 might enable cropping before saving – I think it does – but it still involves extra loading time.
Here’s a Lightshot from Fox News this evening.