BitTorrent Labs has released BitTorrent Sync, a tool for syncing files across computers, using the BitTorrent peer-to-peer protocol. This app lets you choose a specific folder (or folders) to sync, and have it automatically synced on one or several computers. It runs on OS X, Windows and Linux.
I find this an interesting tool. While I use Dropbox regularly, and depend on it for collaboration, and to sync a number of files between my two Macs, there is a limit in the amount of space available. (With the free version, it's 2 GB; paid subscriptions are available if you want more storage.) But also, Dropbox requires that anything you sync be put in its own folder. You can use symbolic links in a Dropbox folder, but if you want to sync the contents of a specific folder on your Mac to another Mac, this gets a bit complicated.
With BitTorrent Sync, you choose the folders to sync, and store them wherever you want. You could conceivably sync your entire home folder, though I'm not sure I want to try that yet. There are no space limitations, because you're not storing the files in the cloud; they're merely getting moved from one side to the other. And you can sync files in both directions, or only one, using read-only folders.
Dropbox has many advantages. You can access files on an iOS device, and Dropbox stores multiple versions of files. But if you want to simply sync one or more folders across computers, BitTorrent Sync could be the way to go.
If anyone else has tried this out, feel free to post comments on how you've found it.
Mac OS X Hints