Unison is a file-synchronization tool for OSX, Unix, and Windows. It allows two replicas of a collection of files and directories to be stored on different hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other. Developed by Benjamin C. Pierce
License: Open Source
ViceVersa offers a user-friendly interface and real-time synchronization, making it ideal for straightforward file syncing tasks. In contrast, Unison provides advanced features such as version control and extensive logging, making it more suitable for technical users needing robust synchronization capabilities.