Open Source: Yes
Source Tarball: https://cgit.freedesktop.org/evtest/snapshot/evtest-1.33.tar.gz
Number of Expected Users: Hard to say but developers and users with hardware issues would all be likely candidates.
Reason for Inclusion: Gives the ability to monitor a specified devices input events which is useful when troubleshooting hardware issues
Note: I've already got a successfully built package(Needed the package for testing) so a patch submission can follow immediately should the triage team accept for inclusion.