IPFS is described as 'Global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in' and is a very popular File Sync tool in the file sharing category. There are more than 50 alternatives to IPFS for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best IPFS alternative is I2P, which is both free and Open Source. Other great apps like IPFS are Hyphanet, ZeroNet, Spideroak One Backup and GNUnet.