Benjamin C. Pierce Unison for Windows

Unison is a file synchronization utility. It allows you to synchronize two copies of files, either on your local computer or on two different hosts, updating each copy based on the changes you make.

In contrast to simple mirror and backup utilities, Unison knows how to handle changes to both file copies. Non-conflicting changes can be made automatically, while conflicting changes are detected and displayed for manual resolution.

Unison works between any computers connected to each other over a global or local network, via a socket or encrypted connection. It also allows you to recover copies of files after a connection failure or an incorrect termination.