SparkleShare is a file sharing and collaboration app. It works just like Dropbox, and you can run it on your own server. It's available for Linux distributions, macOS, and Windows. Support the project on Patreon.
How does it work?
SparkleShare creates a special folder on your computer. You can add remotely hosted folders (or "projects") to this folder. These projects will be automatically kept in sync with both the host and all of your peers when someone adds, removes or edits a file.
Set up a host
Under the hood SparkleShare uses the version control system Git and the large files extension Git LFS, so setting up a host yourself is relatively easy. Using your own host gives you more privacy and control, as well as lots of cheap storage space and higher transfer speeds. We've made a simple script that does the hard work for you. If you need to manage a lot of projects and/or users we recommend hosting a GitLab Community Edition instance.
Build from source
SparkleShare is Free and Open Source software and licensed under the GNU GPLv3 or later. You are welcome to change and redistribute it under certain conditions. Its library
Sparkles is licensed under the GNU LGPLv3 or later.
Note: on some Linux distributions you'll need the TopIcons extension for GNOME Shell to show the SparkleShare status icon.
Have fun, make awesome. :)