I stumbled across this handy little tool. It's amazing and beautifully designed and it lets you crop / create perfect images for social networks like Twitter, Facebook or Google+.The tool itself is a website optimised both for mobile or regular use. It's dead simple to use just pick what kind of service / image you want to create for and the tool guides you through the steps.http://www.autreplanete.com/ap-social-media-image-maker/