Open-Source Location Bookmark Manager

Is there an open-source location bookmark manager that can save locations and organize them into folders?

How do you manage your saved locations—do you use open-source software or run a solution in a Docker container?

I’m currently using Organic Maps, where I simply add locations to Favourites. However, I’m looking for something more advanced than just saving geolocations and names.

Some alternatives I’ve considered:

• I’m not sure whether Nextcloud provides this feature or not.

thanks a lot!