Reason: this package appears to be the only software for *nix that provides support for an array of biometric scanners commonly found today. Alternatives to this software are inactive.
This package has a few requirements, mainly libfprintd, iio-sensor-proxy, shared-mime-info, and geoclue.
Open source: Yes. LGPL-2.1
Most recent source tarball: https://people.freedesktop.org/~hadess/fprintd-0.7.0.tar.xz
Github repository: git://anongit.freedesktop.org/libfprint/fprintd