p2p

Syncthing is an open-source peer-to-peer file synchronization tool that keeps your files synchronized between multiple devices without requiring a central server. It provides secure, private, and decentralized file sync with end-to-end encryption.

Kubo is the reference implementation of IPFS (InterPlanetary File System), a global, versioned, peer-to-peer filesystem that seeks to connect all computing devices with the same system of files.

Tox is a distributed, secure messenger with audio and video chat capabilities, providing peer-to-peer encrypted communication without central servers.

Peergos is a secure and private space online where you can store, share and view your photos, videos, music and documents. It also includes a calendar, news feed, task lists, chat and email client, providing a comprehensive private cloud platform with end-to-end encryption.

Chitchatter is a free, peer-to-peer, end-to-end encrypted communication tool designed for private and secure messaging. It offers serverless, decentralized, and ephemeral chat with features like video calls, screen sharing, and file transfers.

RetroShare is a decentralized, encrypted, peer-to-peer communication platform that creates a network of trust between friends, offering secure file sharing, chat, forums, channels, and mail without relying on central servers.