Peergos is described as 'secure and private online space where you can store, share and view your photos, videos, music and documents' and is an app in the file sharing category. There are eight alternatives to Peergos for a variety of platforms, including Mac, Windows, Linux, Android and Android Tablet. The best alternative is Nextcloud, which is both free and Open Source. Other great apps like Peergos are Tox, ownCloud, IPFS and RetroShare.
You should have full control over your data. We help you achieve that: a safe home for all your data. Secure, under your control and developed in an open, transparent and trustworthy way. We are Nextcloud.
IPFS is a 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.
RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using OpenPGP to authenticate peers and .
Bitmessage is a P2P communications protocol used to send encrypted messages to another person or to many subscribers. It is decentralized and trustless, meaning that you need-not inherently trust any entities like root certificate authorities.