Synctity is a program for synchronizing files on multiple machines. It is a front end for rsync that maintains multiple profiles, making often-run syncing tasks easy to perform. Released under the terms of GPLv3.
Synctity runs on Mac OS X, Linux, and other Unix-like operating systems. The latest release provides a stand-alone application bundle for Mac OS X. See the documentation for Linux prerequisites.
Synctity is moving to GitHub. Documentation and the latest release are still available here.
Releases on GitHub
Documentation on Sourceforge
Source on GitHub