Endurain is a self-hosted fitness tracking service designed to give users full control over their data and hosting environment - joaovitoriasilva/endurain
Wanderer (https://github.com/Flomp/wanderer): Also similar, but has social sharing and geared more towards trail recording like Alltrails. Also does not have weight tracking.
Note: Another big differentiator seems to be Garmin and Strava integrations.
So for those wondering on comparisons to other FOSS options:
Fittrackee (https://github.com/SamR1/FitTrackee): Very similar, but Endurain also seems to track weight vs just activity.
Wanderer (https://github.com/Flomp/wanderer): Also similar, but has social sharing and geared more towards trail recording like Alltrails. Also does not have weight tracking.
Note: Another big differentiator seems to be Garmin and Strava integrations.