Pixlr Desktop organizes all of the effects in a tree diagram which allows you to easily navigate the categories. The first layer of tools is composed of graphic effects, enhancement, layering effects, borders, stylize, stickers, and text; in turn, teach one of these are divided in subcategories.
All of these effects are stackable, and thus in just a few steps, you can apply a border, eliminate red-eye, blur edges, and add post-processing brightness with professional results.
This tool is completely free and by simply creating an account with Pixlr, you’ll have instant access to many more effects, which are free as well. There’s also a paid pro-version with a monthly subscription that comes with many additional features of cropping, brush editing, and other effects that bring this app closer to other versatile programs such as Photoshop and Gimp.