App Stores for iOS
Apple actually only supports a few other app stores. Some of the options include the Tutu app, Tweak Box and Panda Helper, which often allow users to download beta / test releases and third-party apps that are not available on the official App Store.
Cydia is an unofficial app store available for jailbreak devices with iOS.
The company's developers distribute their applications on all possible platforms that have a target audience, and some of them are: Amazon App Store, GetJar, Opera Mobile Store, Appolicious, Appszoom, NexVa, Appland, Kongregate, Itch.io, etc.