Spinxo.com and NameGenerator.biz are two screen name generators that offer a wide variety of functions. These generators create screen names for generator usage as well as for specific websites like Instagram, Youtube, Twitter and more.
Screen name generators are useful for creating new screen names in situations where it's hard to think of one. Because some websites and applications put restrictions on the length of a screen name along with what characters can be in the screen name, using a generator like Spinxo.com or NameGenerator.biz helps ensure the screen name generated works with the service. Screen name generators often will generate random screen names based on a few word inputs, or will generate a list of names that are completely random for a user to choose from.