Perhaps the company's most important innovation since its co-founder Bram Cohen released the BitTorrent protocol in 2001, BitTorrent Sync is now available to download. Sync is a free tool that synchronizes files across all of your devices, and also allows you to share those files with friends and family (a la Dropbox). Most importantly, though, Sync is based on the peer-to-peer BitTorrent protocol, so your files move directly from one device to another, never passing through a midpoint.