Client for the Seafile cloud file server and project management software. If you are in a small team with a few people, you can create a group in Seafile and invite other team members. Team members can then maintain file libraries together and collaborate around them. You can try the <a href="https://seacloud.cc/demo">demo</a>, sign up for an account at the website, or since the server-side is also free-as-in-freedom, it can be installed on any server and configured to work with the app.