Nationbuilder is a unique tool for building large communities online. For musicians, it can be used to organize fan clubs and street teams. Nationbuilder is cool because of its wide-ranging feature set, which includes content management, customer relationship management, gamification, email marketing and more. It takes a little bit of elbow grease to bend the platform to your needs, but it can do pretty much anything you need it to. With plans starting at $19/mo., it’s neither prohibitively expensive nor cheap. However, if you can make use of all the features, it can replace the need for subscribing to multiple other services.