Not what you’re searching since it has no social components and is not for gym workouts, but I really like Geoactivity Playground. It takes your Strava Export or uses your GPX files and does really interesting statistics with it. Kind of like Veloviewer, but selfhosted

https://github.com/martin-ueding/geo-activity-playground

Drip A tracking free, cloud free and subscription free period tracker. There are a lot of period tracking apps around, but most of them try to push a subscription on their users and putting that data into a cloud can be dangerous in many countries where abortions are forbidden. You know that some judge in Texas wants to have access to that data. Save yourself or the women in your life from subscribtion and tracking hell and switch them over.