What are the Ways to Distribute a Mobile App other than AppStore

iOS Developer Enterprise Program
 For Android &iPhone: Following stores allow to publish multi-platform apps(Android &iOS)

·            Enterprise App Zone                                                                      http://www.enterpriseappzone.com/features

·            Nukona App Center                                                                        https://www.nukona.com/mobile-app-management-products/enterprise-edition/

 Other than Google Play Store, different stores are

1)               Slide Me      

2)               Amazon Appstore

3)               Get Jar

4)               Android PIT App center