Self-hosted projects built with C

Ollama is a local LLM runtime that lets you pull, run, and customize models, offering a CLI and REST API for chat, generation, and embeddings.

MITActively maintained

Alternative to:

OpenAI API+15

Open-source, agent-based monitoring platform delivering per-second metrics, edge ML anomaly detection, tiered time-series storage and centralized cloud UI.

GPL-3.0Actively maintained

Alternative to:

Datadog Cloud Monitoring+16

NGINX is a high-performance HTTP server and reverse proxy with caching, load balancing, TLS termination, and TCP/UDP proxying via a modular architecture.

BSD-2-ClauseActively maintained

Alternative to:

NGINX Management Suite+2

Valkey is an open-source, Redis-compatible key/value datastore optimized for caching, queues, and other real-time workloads, with clustering, replication, and extensibility.

BSD-3-ClauseActively maintained

Alternative to:

Redis Cloud+4

Typesense is a developer-friendly search engine for instant, typo-tolerant search-as-you-type with faceting, filtering, geo search, and vector/semantic search APIs.

GPL-3.0Actively maintained

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Algolia+19

Calibre is a cross-platform e-book manager to organize libraries, edit and convert formats, fetch metadata, and sync content to e-readers.

GPL-3.0Actively maintained

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Adobe Digital Editions+3

Alternative open source firmware for ESP8266/ESP32 IoT devices, providing local control via MQTT/HTTP/Web UI, OTA updates, and built-in automation rules and timers.

GPL-3.0Actively maintained

Alternative to:

SONOFF Cloud (eWeLink)+6

PostgreSQL is an advanced open source object-relational database with strong SQL compliance, ACID transactions, extensibility, and robust indexing and replication options.

Actively maintained

Alternative to:

Amazon Relational Database Service (Amazon RDS)+12

Kodi is an open source media center for organizing and playing local and networked video, music, and photos with a TV-friendly interface and add-on ecosystem.

Actively maintained

Alternative to:

Microsoft Windows Media Player+7

GoAccess is a real-time web log analyzer that turns server access logs into interactive terminal (TUI) or browser-based dashboards, plus HTML/JSON/CSV reports.

MITActively maintained

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Google Analytics+6

EMQX is a high-performance MQTT broker and IoT messaging platform with clustering, security controls, a SQL rules engine, and integrations to databases and event systems.

Actively maintained

Alternative to:

EMQX Cloud+3

Self-hosted file sync and share platform with libraries, sharing links, versioning, and optional end-to-end encrypted libraries for private team collaboration.

Actively maintained

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Dropbox+19

OpenVPN is a widely used open-source VPN daemon providing TLS/SSL-based secure tunneling, flexible client-server and site-to-site modes, and cross-platform support.

Actively maintained

Alternative to:

OpenVPN CloudConnexa+18

BorgBackup is a deduplicating backup program with authenticated encryption and compression for Unix-like systems.

Actively maintained

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BorgBase+14

MySQL is an open source relational database for SQL-based transactional and analytical workloads, supporting replication, high availability, and clustering options.

Actively maintained

Alternative to:

Amazon Relational Database Service (Amazon RDS)+11

Eclipse Mosquitto is a lightweight, open-source MQTT broker supporting MQTT 5.0 and 3.1.1, plus client libraries and CLI tools for pub/sub messaging.

Actively maintained

Alternative to:

EMQX Cloud+11

Thumbor is an open-source image processing server for on-demand resizing, smart cropping, format conversion, and filter pipelines via URL-based HTTP requests.

MITActively maintained

Alternative to:

CloudConvert+4

Janus WebRTC Server is a lightweight, general-purpose WebRTC gateway for building real-time audio/video applications via plugins and a JSON-based API.

GPL-3.0Actively maintained

Alternative to:

Ant Media Server Cloud+2

OpenTTD is an open-source transport simulation game based on Transport Tycoon Deluxe, featuring deep logistics gameplay, modding support, and multiplayer.

Actively maintained

Alternative to:

Minecraft Realms+10

iodine is a DNS tunneling tool that forwards IPv4 traffic through DNS queries and replies, providing a TUN interface to route IP traffic when only DNS is allowed.

ISCSlowing down

Alternative to:

Cloudflare Tunnel+15

ClamAV is an open-source antivirus toolkit providing a multi-threaded daemon, command-line scanners, and automatic signature updates for mail gateways and file scanning.

GPL-2.0Actively maintained

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McAfee+8

HAProxy is a fast, reliable reverse proxy and load balancer for TCP and HTTP applications, providing high availability, TLS termination, health checks, and traffic routing.

Actively maintained

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HAProxy Enterprise+10

Zabbix is an open-source monitoring and observability platform for networks, servers, VMs, applications, and cloud infrastructure, with alerting and dashboards.

AGPL-3.0Actively maintained

Alternative to:

Datadog Cloud Monitoring+17

Open-Meteo is an open-source weather API providing hourly forecasts, historical weather, air quality and more from national weather models, with optional self-hosting.

Tinyproxy is a small, efficient HTTP/HTTPS proxy daemon for POSIX systems, designed for low resource usage with access controls, filtering, and optional reverse/transparent proxying.

GPL-2.0Actively maintained

Alternative to:

Charles Proxy+9

Unison is a cross-platform, bidirectional file synchronization tool that keeps two directory replicas in sync over SSH or TCP, with conflict detection and offline support.

GPL-3.0Actively maintained

Alternative to:

GoodSync+13

FreeSWITCH is an open-source software-defined telecom stack for building VoIP and real-time communication services with SIP and WebRTC support.

Actively maintained

Alternative to:

Twilio+15

Standards-based validating recursive DNS resolver with DNSSEC validation, DNS-over-TLS/HTTPS support and configurable caching for privacy and performance.

BSD-3-ClauseActively maintained

Alternative to:

Cloudflare DNS+9

Varnish Cache is a high-performance HTTP reverse proxy cache for accelerating web applications and APIs with flexible caching rules and detailed request logging.

Actively maintained

Alternative to:

Cloudflare CDN+5

Open-source browser-based gateway enabling VNC, RDP, and SSH access to remote desktops without client software.

Apache-2.0Actively maintained

Alternative to:

Citrix DaaS+17