Self-hosted projects using C

VerneMQ is a high-performance, distributed MQTT broker for scalable, highly available IoT and M2M messaging, with clustering, TLS, WebSockets, plugins, and integrations.

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HiveMQ Cloud+3

Open-source TV streaming server and DVR for Linux supporting DVB/ATSC/IPTV inputs and HTSP/HTTP streaming.

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Channels DVR+3

OvenMediaEngine (OME) is a sub-second latency live streaming server that ingests multiple protocols, transcodes to ABR, and delivers streams via WebRTC and Low-Latency HL...

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Wowza Streaming Cloud+15

Open-source PBX and telephony toolkit for building communications applications; modular C-based engine with SIP, WebRTC, RTP, ARI/AMI APIs and hardware support.

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3CX+19

Self-hosted voice assistant platform for ESP32 devices with on-device wake-word and command recognition, Home Assistant integration, and an optional inference server for...

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Amazon Alexa+9

Kamailio is an open source SIP signaling server for scalable VoIP and real-time communication platforms, supporting routing, load balancing, WebRTC, and IMS/VoLTE.

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AudioCodes Mediant Session Border Controller (SBC)+6

MPD is a modular, network-controlled music server that streams and manages a local music collection via a protocol-enabled daemon.

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Volumio Premium (MyVolumio)+8

Tox is a decentralized, peer-to-peer communication system for encrypted messaging, voice/video calls, screen sharing, and file transfers without central servers.

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Signal+12

Open source audio and video casting system that turns Linux-capable hardware into a network receiver for streaming local files, URLs, and media servers.

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Sonos+5

Open source groupware suite providing webmail, calendaring, address books, and shared resources via open standards like IMAP, CalDAV, and CardDAV.

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Microsoft Exchange Online+19

uStreamer is a lightweight, fast MJPEG-over-HTTP streamer for V4L2 capture devices, optimized for high-FPS HDMI/VGA capture and PiKVM-style KVM over IP use.

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AXIS Camera Station

RetroShare is a decentralized friend-to-friend platform for encrypted chat, mail, forums, channels and secure file sharing, with optional Tor/I2P support.

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Telegram+19

Open-source music server that streams local libraries, internet radio, and streaming services to Squeezebox hardware and software players like Squeezelite.

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Roon+12

High-performance web application firewall and API security gateway with semantic detection, rule management, and reverse-proxy deployment for protecting websites and APIs...

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Cloudflare Web Application Firewall (WAF)+9

OpenPrinting CUPS is a standards-based printing system providing IPP print services, printer administration, and command-line tools for Linux and Unix-like systems.

Hypersomnia is a community-driven multiplayer top-down shooter built in modern C++ without a game engine, featuring deterministic netcode and an in-game map editor.

GPL-licensed SIP server/proxy for carriers, ITSPs, and enterprises, enabling scalable signaling, routing, and application integration.

sist2 is a fast, low-memory file system indexer with a web UI for searching file contents and metadata, with Elasticsearch or SQLite backends.

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Elastic Cloud (Elasticsearch Service)+7

High-performance, standards-compliant IMAP/POP3/LMTP server with flexible authentication, extensible plugin system (Lua, Sieve) and OpenSSL TLS support.

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Microsoft Exchange Online+15

Lightweight OwnTracks location data recorder that ingests MQTT/HTTP publishes, stores them locally without an external DB, and exposes a REST/WebSocket API and web UI.

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Life360+1

Free, cross-platform open-source RTS featuring physics-based combat, terrain deformation, a large unit roster, and competitive multiplayer including co-op and campaigns.

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StarCraft II+2

Cyrus IMAP is a secure, scalable mail server providing IMAP/JMAP email plus CalDAV/CardDAV contacts and calendars, with ACLs, quotas, search, and replication.

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Microsoft Exchange Online+18

NZBGet is a fast, lightweight Usenet NZB downloader with a remote web UI, queue management, post-processing, and automation-friendly integration with media managers.

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Easynews+1

ngIRCd is a free, portable and lightweight IRC server for small/private networks, supporting IPv6, TLS, server linking, and optional PAM authentication.

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IRCCloud+3

An open-source, fast-paced arena shooter featuring parkour mechanics, multiplayer modes, and a realtime WYSIWYG map editor for cooperative map creation.

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Quake Champions+4

UnrealIRCd is an open-source, modular IRC server implementing IRCv3, TLS, anti-spam/flood protections, GeoIP and admin APIs for running public or private IRC networks.

MistServer is an open-source streaming media toolkit that supports HLS, DASH, RTMP, RTSP, SRT and WebRTC for low-latency live and VOD workflows.

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Wowza Streaming Cloud+13

A protocol gateway that bridges users across different instant messaging networks using libpurple adapters, enabling cross-network chat and presence.

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Ably Realtime+5

A small, C-based Mail Transfer Agent for local submission and outbound relay with TLS/SMTP authentication, aimed at home and small office use.

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Postfix+11

Scalable email archiving solution with tamper-evident retention, full-text search, legal hold, deduplication and access controls for compliance.

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MailStore Server+1