To Write Love On Her Arms (twloha) is a non-profit organization that is dedicated to helping people suffering from depression, suicide, self harm and addictions. They are selling really cool t-shirts on their online store. Check them out, get something fashionable to wear and help someone suffering.
TheYellow Bird Projectis a charity based initiative where you can purchase a t-shirt designed by indie musicians. I am loving the wolf parade t-shirt at the moment. Be sure to check it out, you'll get a cool t-shirt, help someone out and feel good about yourself too.