Available at $2.99 in the Mac App Store, FolderWatch is an easy-to-use yet powerful utility that can monitor any folder on your Mac and sync it back to a different location. In FolderWatch, you can specify an unlimited amount of “sources” (e.g. folders) that the app will monitor for changes, like new files or folders within them. Once a “destination” is set, FolderWatch will run in the background and make a carbon copy of the source to the other folder, server or external drive you have set.

FolderWatch, indeed, can copy files to any location that can be added to your Mac’s Finder. Any networked drive, local server, FTP location mounted in the Finder can be selected as a destination. Personally, I am sending backups of media and Linkinus chat logs on to an external USB drive connected to the AirPort Extreme that powers my home network. Everything happens automatically, in the background;  you can choose to make these copy sessions persistent on each change in the destination (backup will start as soon as a new or updated file is recognized) or trigger them manually with the “Sync” button.

The app can also skip files through filters you can create / delete when adding a new rule, and delete files in the destination folder that do not exist in the source. This will let you easily achieve some sort of sync between folders on your OS X machine that’s quite handy. It’s not as complex and feature-rich like FileSorter and Hazel, but it all works smoothly and requires  a very few clicks to be set up.

FolderWatch is available at $2.99 here. More screenshots below.