The picture opens up with an array of editing tools. From the simple tools like cropping and resizing to more complex options like color and lighting filter effects and adding text, overlays, or frames or creating collages - PicMonkey has it. You can also use many editing tools designed just for human photo subjects like blemish correction, red eye fixes, adding hair, teeth whitening, changing eye color, and so much more.
It is a pretty thorough image editor for one that it free and completely online, and definitely handy when using ChromeBooks.
To get this great tool, at the Google Chrome Store, go to PicMonkey! It is also available as an app if you prefer.