Quick Settings — Open Source Productivity App

Quick Settings provides quick access to various Android system settings, such as WiFi, GPS, brightness and all the various volume controls. Can be launched by long-pressing the hardware search key, or via the status bar. Anti-feature: Addons. Promotes other apps that aren't FOSS. Status: This app won't receive any further updates as the author is not publishing the source code for the newer versions (or indeed, older versions).