Apps to Folder Synchronization

Toucan is a lightweight, portable application designed for advanced users requiring robust data synchronization, backup, and encryption capabilities. Ideal for managing files across various locations with features like scheduled tasks, incremental backups, and built-in encryption.

Unison is a robust, open-source file synchronization tool for macOS, Unix, and Windows. It enables reliable bidirectional synchronization between two replicas of files and directories across different hosts or disks, ensuring both locations are kept up-to-date with changes.

Double Commander is a free and open-source cross-platform file manager with a classic dual-panel interface. It provides essential file management operations alongside advanced features like batch renaming, folder synchronization, and built-in viewers and editors, making it a comprehensive tool for efficiently organizing and manipulating files across various operating systems.

WinMerge is an open-source differencing and merging tool for Windows. It helps you compare, synchronize, and merge both files and folders, highlighting differences visually and providing robust tools for handling conflicts.