App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
SmallDevTools - Handy developer tools with a delightful interface
AppFollow - AppFollow is an integrated solution that makes monitoring, analyzing, and elevating your app's reputation easy.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
appfigures - Cross-platform app store analytics for all of your mobile apps.
TextLab - TextLab is the fastest way to format, prettify, transform, hash, encode, and decode your data instantly!