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High-performance and feature-rich chat server for Matrix, and the successor to conduwuit (fork of Conduit)

Modern IRCv3 server written in Go, combining the features of an ircd, a services framework, and a bouncer

Modular IRC server written in C++ for Linux, BSD, Windows, and macOS

Responsive web IRC client with theming support

Portable and lightweight Internet Relay Chat server for small or private networks

Distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core

IRC without netsplits. Distributed IRC server, based on RobustSession protocol

Self-hosted web IRC client

Modular, advanced and highly configurable IRC server written in C for Linux, BSD, Windows, and macOS

Fast, light and extensible chat client

Advanced IRC bouncer

Federated microblogging server with Mastodon, GNU social, and ActivityPub compatibility

Knowledge-based community software. You can use it to quickly build your Q&A community for product technical support, cu

Comment system built in Golang, providing a lightweight and highly customizable solution for adding comments to your web

Fast, SQLite-powered forum engine written in ASM

Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profil

Privacy-friendly and customizable Disqus (comment system) alternate

A better commenting experience from Vox Media

Distributed social networking server

Powerful open source social networking engine

Enigma 1/2 is a modern, multi-platform BBS engine with unlimited "callers" and legacy DOS door game support

Social Communication Server

ActivityPub federated social network server implementing the Mastodon client API

Bridge that interacts with Fediverse on behalf of your static site