MicroG: Free-libre re-implementation of Google's proprietary Android user space

microG GmsCore is a free, open-source reimplementation of Google's proprietary Play Services that allows Android applications to run on AOSP-based ROMs without Google's non-free services. It provides features like optional Google Services integration, location services, and reduced battery/memory usage while helping users reclaim privacy and freedom on their Android devices. The project requires Android systems with signature spoofing support and welcomes community contributions to expand its API implementation.