AppBrain App Market is a powerful alternative to Google Play (formerly Android Market), which has a number of features interesting enough to consider it the Android AppShopper. Developed by Swiss Codemonkeys
License: Free
AppBrain excels in app discovery and detailed analytics for developers, making it ideal for those looking to market their apps effectively. In contrast, Amazon Appstore benefits from integration with Amazon's ecosystem, offering unique deals and cloud services, but has a more limited app selection.