Balloon is an alternative to DropBox with file version control. It is based on Mercurial and supports Git. Local repositories on different hosts are automatically synchronized with a remote repository thanks to the inotify API.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.