SparkleShare is an open-source file synchronization and collaboration tool that's powered by Git. After being in development for a long time, SparkleShare 1.0 was released on Sunday.
SparkleShare development began three years ago at a GNOME hacking session in Lodon. The open-source software works on Linux, Mac OS X, and Windows. The program creates a "special folder" where projects are kept and all projects are automatically synced to the hosts.
For those wanting to learn more about SparkleShare 1.0, read this lengthy blog post release announcement
by the program's main developer.