Stencil for WordPress is the fastest way to design images as you post! With the Stencil WordPress plugin installed, you have access to millions of photos and premium icons, hundreds of templates and the world's easiest to use image creator.
I've used the Stencil app for over a year and it's way easier to use than Canva, PicMonkey, or any others I've tried. It looks like the plugin is exactly the same interface, just inside WordPress.
Easy access to thousands of free pics without worrying about copyright.
none that I can think of