Unison

Unison syncs files on OSX, Unix, and Windows. It is for people who use one or more of these operating systems and need to keep their files in sync. The program has one clear job: file synchronization. An OSX user can use it for that job, and so can a Unix or Windows user. As an open source tool, Unison gives this audience a file-sync option that covers all three named systems. It fits users who want a program devoted to file synchronization rather than a broader set of tasks. The main limitation is its platform range. Unison supports OSX, Unix, and Windows; no other platform is included in that range. A user who needs a different operating system falls outside the listed support. No specific paid product is known as a direct replacement. Unison is best suited to people whose file-sync work stays on OSX, Unix, Windows, or a mix of those systems.