Apps Related to Private messaging

ZeroMe is a decentralized, peer-to-peer social network powered by ZeroNet. It offers a censorship-resistant platform where users control their data and communication, featuring threaded conversations, private messaging, and an emphasis on free speech.

Movim is a distributed social network platform leveraging the open XMPP protocol. It provides a decentralized environment for users to connect, share content, and communicate through chat and group messaging, offering an alternative to centralized social media.

Chamilo is a free, open-source learning management system (LMS) designed to improve access to education. It offers a comprehensive suite of tools for creating, managing, and delivering online courses and training programs, suitable for educational institutions and corporate environments alike.

Libertree is a free, libre, and open-source software platform designed to empower individuals and groups to create their own decentralized social networks. It offers a comprehensive suite of communication and community-building tools, prioritizing user control, privacy, and freedom of expression.

Simple Machines Forum (SMF) is a powerful and free open-source forum software designed to provide a robust platform for online communities. It offers a comprehensive set of features for building and managing dynamic message boards.

MyBB (MyBulletinBoard) is a free, open-source forum platform written in PHP and utilizing MySQL. It provides a robust and extensible solution for building online communities, offering features like integrated spam protection, user management, and a plugin system for customization.

Moodle is a widely adopted, open-source Learning Management System (LMS) designed to provide educators, administrators, and learners with a single, robust, and secure system to create personalized learning environments. It facilitates online learning, blended learning, and distance education with a comprehensive set of tools for course creation, delivery, and management.

BuddyPress is a robust, free, and open-source social networking software that integrates seamlessly with WordPress. It allows you to build a fully-featured community website with user profiles, activity streams, groups, and private messaging, providing a decentralized and self-hosted alternative to traditional social platforms.

Identi.ca is a free and open-source decentralized social networking and microblogging service built on the pump.io software and Activity Streams protocol.

Minds is an open-source and decentralized social networking service dedicated to online freedom, privacy, and monetization for content creators. It champions free speech and offers a platform that rewards users for engagement through a points and token system.

phpBB is a free and open-source bulletin board software written in the PHP programming language. It provides a robust platform for creating and managing online communities through discussion forums, enabling users to engage in conversations, share information, and build connections.

Friendica is a decentralized, open-source social network platform designed for users who value privacy, customization, and control over their online social interactions. It allows individuals to host their own servers and connect with the broader fediverse.

Diaspora is a user-owned, nonprofit, and decentralized social network based on the free Diaspora software. It aims to provide a privacy-focused alternative to traditional social media platforms, empowering users through distributed infrastructure and a focus on community control.

GNU social is a free and open-source social networking software that empowers users to create decentralized, federated social networks. It offers a privacy-focused platform for public and private communication, emphasizing free speech and user control.