encryption

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.

Element is a secure and decentralized communication client for the Matrix network. It provides end-to-end encrypted messaging, voice/video calls, file sharing, and collaboration features with a focus on privacy and security.

SimpleX Chat is the most private and secure messaging platform with no user identifiers, featuring double ratchet E2E encryption and a unique approach to privacy that doesn't require phone numbers or usernames.

Buku is a powerful bookmark manager and a personal textual mini-web. Built with Python, it provides a command-line interface for managing bookmarks with advanced features like encryption, tagging, and full-text search, designed for power users and terminal enthusiasts.

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

OneTimeSecret is an open-source service for sharing sensitive information like passwords and private links that self-destruct after being accessed, ensuring your confidential data stays out of email inboxes and chat logs.

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.

Etebase (EteSync) is an end-to-end encrypted and journaled personal information server supporting calendar and contact data, offering its own clients. Built with Python/Django, it provides secure, private synchronization with zero-knowledge encryption for personal data.

GlobaLeaks is a free and open-source whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform. It provides end-to-end encryption, anonymity features, and comprehensive security measures.

Databag is a federated messenger for self-hosting that focuses on efficiency and minimal resource usage. It provides decentralized communication with end-to-end encryption, audio/video calls, and topic-based threading.