I have been doing some research on alternative Android app stores. Most of my clients tend to stick with the Google Play store but I know one or two individual developers, who publish their own apps, who actually avoid the Play store as it has reputation for lack of visibility and piracy. So what are the options?
I have found a great old, but useful, post by DrMop that lists the alternative stores and experiences of using some of them. You might also take a look at mobyaffiliate’s list of app stores that covers other platforms/manufacturers/carriers and Distimo’s analysis of the app market and app stores.
My personal feeling is that dealing with multiple app stores is a large amount of effort to keep up to date and support. However, if you have a business model based on downloads rather than purchases then multi-app stores might be worthwhile.