Browse free open source C Application Servers and projects below. Use the toggles on the left to filter open source C Application Servers by OS, license, language, programming language, and project status.

  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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  • 1
    Unified Communication X

    Unified Communication X

    Communication framework for data-centric high-performance applications

    Accelerate Your Network Performance with UCX. Collaboration between industry, laboratories, and academia to create an open-source, production-grade communication framework for data-centric and high-performance applications. Unified Communication X (UCX) is an award winning, optimized production proven communication framework for modern, high-bandwidth and low-latency networks. UCX exposes a set of abstract communication primitives which utilize the best of available hardware resources and offloads. These include RDMA (InfiniBand and RoCE), TCP, GPUs, shared Memory, and network atomic operations. UCX facilitates rapid development by providing a high-level API, masking the low-level details, while maintaining high-performance and scalability. UCX implements best practices for transfer of messages of all sizes, based on accumulated experience gained from applications running on the world’s largest datacenters and supercomputers.
    Downloads: 5 This Week
    Last Update:
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  • 2
    NetProg is an API in C language allowing an homogeneous programming of communicating applications on many operating systems. It covers all the need for applications that requires complex way of exchanging data in synchronous or asynchronous mode. Based on messages for exchanging data between clients and servers, it, moreover, access databases or files with the same message modelling.
    Downloads: 3 This Week
    Last Update:
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  • 3
    Online Hierarchical Storage Manager (OHSM) is the first attempt towards an enterprise level open source data storage manager which automatically moves data between high-cost and low-cost storage media.
    Downloads: 1 This Week
    Last Update:
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  • 4
    NTK RTMP SERVER

    NTK RTMP SERVER

    Naam Tamilar Web TV Live Streamer

    Naam Tamilar RTMP Server This project updated as open source for future use of Naam Tamilar Political Party. To contribute to the party and in some case if there is any possibilities if i cannot support them for long term. I thought of sharing this source code so in future it may be helpful for the community and party in which other software developers can help them to upgrade. This source is forked from - https://github.com/arut/nginx-rtmp-module and modified with multiple broadcast option. Stream Sources will be able to restreamed to RTMP Player, Youtube API, Facebook API, Twitch and any other plaftforms that supports streaming with API and stream key. All these can be published simultaneously at the same time. ForFirst UAT - User Acceptance Test has been conducted @ Pollachi Veerathamilatchi Sengodi Nenaivendal @ Sandaipettai Thidal, Pollachi on 19 August 2017 #3146 Viewed Simultaneously Streamed with 16 GB Ram, 500 GB SSD, Ubuntu 16.04 LTS Server with NTK RTMP Server
    Downloads: 2 This Week
    Last Update:
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  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
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  • 5
    Photon provides very fast access to data containers (queues, maps, etc.) in shared memory - it can retrieve millions of data records per second. It also uses some RDB concepts like transactions and crash recovery. See web site for details.
    Downloads: 2 This Week
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  • 6

    rldns

    rldns is an open source lightweight DNS server for linux & bsd (x64)

    rldns is an open-source, lightweight DNS server designed for Linux, NetBSD, FreeBSD, and OpenBSD. It supports both x86 and x86_64 architectures. Developed by Antonius (w1sdom) from bluedragonsec.com Latest Update: Version 1.3 (Released February 2026). This release includes core performance optimizations and enhanced query handling.
    Downloads: 1 This Week
    Last Update:
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  • 7
    AIS is an Development Platform providing a high-speed JIT compiler for LISP and JavaScript, web server, object repositories, MySQL integration and libraries supporting a wide variety of advanced genetic programming and symbolic regression techniques.
    Downloads: 0 This Week
    Last Update:
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  • 8
    The goal of Gossamer is to provide a set of libraries & tools for distributed, fault tolerant, computing. This is done by breaking tasks up into small units which are then processed by seperate servers, which may reside locally or across a network.
    Downloads: 0 This Week
    Last Update:
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  • 9
    Jina, A tiny web server for embedded Application written in Java
    Downloads: 0 This Week
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  • Auth0 B2B Essentials: SSO, MFA, and RBAC Built In Icon
    Auth0 B2B Essentials: SSO, MFA, and RBAC Built In

    Unlimited organizations, 3 enterprise SSO connections, role-based access control, and pro MFA included. Dev and prod tenants out of the box.

    Auth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.
    Sign Up Free
  • 10
    KQ Server - small and fast server for FreeBSD with kqueue mechanism usage.
    Downloads: 0 This Week
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  • 11
    A windows based simulator for a real multimedia message service center.
    Downloads: 0 This Week
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  • 12
    Neocron is a Cyberpunk MMORPG released by Reakktor Media GmbH. This custom dissector for the popular open source packet analyzer Wireshark will help developers by collecting packet data from all available projects and combining them into one archive.
    Downloads: 0 This Week
    Last Update:
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  • 13
    Neocron is a Cyberpunk MMORPG released by Reakktor Media GmbH. This custom dissector for the popular open source packet analyzer Wireshark will help developers by collecting packet data from all available projects and combining them into one archive.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    OSAR Appliances

    OSAR Appliances

    The OSAR Linux Image for Augmented Reality and Computer Vision

    The OpenSUSE Augmented Reality (OSAR) distribution is the first GNU / Linux appliance created for the exclusive development of applications with augmented reality technology and games with computer vision.
    Downloads: 0 This Week
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  • 15
    Open Source Application Server Appliance based on Open Source GlassFish
    Downloads: 0 This Week
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  • 16
    A set of embedded and application software for smart power meter
    Downloads: 0 This Week
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  • 17
    This is a project about adding persistence into memcache. it create a proxy server between the client and the memcache, and add a BDB(Berkeley DB) or any other db which base on key-value to backup the infomation in memcache to the harddisk.
    Downloads: 0 This Week
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  • 18
    SecurityFusion is an open source network intrusion detection and prevention system based in Hogwash, capable of performing real-time traffic analysis and packet logging on IP networks.
    Downloads: 0 This Week
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  • 19
    Signal Visualizer is a client/server system that uses TCP/IP to display digital signals (DSP) graphically onto a remote server. The only requirements for the embedded system are : a physical IP interface and a C/C++ compiler that includes a socket API.
    Downloads: 0 This Week
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  • 20
    A Public Key Cryptographic system based on OpenSSL and MySQL.
    Downloads: 0 This Week
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  • 21
    Prebuilt Apache Tomcat Connectors binaries and enhanced ISAPI Redirector with HTTP 1.1 chunk encoded responses for high scalability on IIS/Microsoft Windows sites.
    Downloads: 0 This Week
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  • 22
    Some evil organize block user' internet access by blocking urls and services, or they moniter content of transfering data. Our goal is to unlock the internet access, let user access internet freely and safely.
    Downloads: 0 This Week
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  • 23
    VirtuoCP is a Virtual private server (VPS) control panel. It is designed to perform VPS operations in a GNU/Linux server having OpenVZ virtualization technology. VirtuoCP is a Free software distributed under GPL license.
    Downloads: 0 This Week
    Last Update:
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  • 24
    Web software platform daemon.
    Downloads: 0 This Week
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  • 25
    XSPD High Performance Application Server

    XSPD High Performance Application Server

    Extended Server Pages (XSP/XSPD) for UNIX or Linux, C-based

    XSP/XSPD high performance session based web application server for C/C++, Java and shell-scripts, requires UNIX/Linux based operating system, development of application programs like JSP's in C/C++, Java and/or shell scripts within same session context.
    Downloads: 0 This Week
    Last Update:
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