SlackBuildsOrg/desktop/seafile-gui

Graphical desktop client for the Seafile next-generation open
source cloud storage system with advanced support for file syncing,
privacy protection and teamwork.

Collections of files are called libraries, and each library can be
synced separately. A library can be encrypted with a user chosen
password. This password is not stored on the server, so even the
server admin cannot view a file's contents.

Seafile allows users to create groups with file syncing, wiki, and
discussion to enable easy collaboration around documents within a
team.