Browse free open source Application Servers and projects below. Use the toggles on the left to filter open source 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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  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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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: 56 This Week
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  • 2
    NATS

    NATS

    Server for NATS.io, the cloud and edge native messaging system

    With flexible deployments models using clusters, superclusters, and leaf nodes, optimize communications for your unique deployment. The NATS Adaptive Edge Architecture allows for a perfect fit for unique needs to connect devices, edge, cloud or hybrid deployments. With true multi-tenancy, securely isolate and share your data to fully meet your business needs, mitigating risk and achieving faster time to value. Security is bifurcated from topology, so you can connect anywhere in a deployment and NATS will do the right thing. With the ability to process millions of messages a second per server, you’ll find unparalleled efficiency with NATS. Save money by minimizing cloud costs with reduced compute and network usage for streams, services, and eventing. NATS self-heals and can scale up, down, or handle topology changes anytime with zero downtime to your system. Clients require zero awareness of NATS topology allowing you future proof your system to meet your needs of today and tomorrow.
    Downloads: 15 This Week
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  • 3
    ioredis

    ioredis

    A performance-focused Redis client for Node.js

    ioredis is a robust, full-featured Redis client that is used in the world's biggest online commerce company Alibaba and many other awesome companies. Full-featured. It supports Cluster, Sentinel, Streams, Pipelining and of course Lua scripting & Pub/Sub (with the support of binary messages). High performance. Delightful API. It works with Node callbacks and Native promises. Transformation of command arguments and replies. Transparent key prefixing. Abstraction for Lua scripting, allowing you to define custom commands. Support for binary data. Support for TLS. Support for offline queue and ready checking. Support for ES6 types, such as Map and Set. Support for GEO commands. Support for Redis ACL. Sophisticated error handling strategy. Support for NAT mapping. Support for autopipelining. ioredis supports all of the scripting commands such as EVAL, EVALSHA and SCRIPT.
    Downloads: 8 This Week
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  • 4
    µWebSockets

    µWebSockets

    Compliant web server for the most demanding of applications

    Being meticulously optimized for speed and memory footprint, µWebSockets is fast enough to do encrypted TLS 1.3 messaging quicker than most alternative servers can do even unencrypted, cleartext messaging. Furthermore, we partake in Google's OSS-Fuzz with a ~95% daily fuzzing coverage with no sanitizer issues. LGTM scores us flawless A+ from having zero CodeQL alerts and we compile with pedantic warning levels. µWebSockets is written entirely in C & C++ but has a seamless integration for Node.js backends. This allows for rapid scripting of powerful apps, using widespread competence. We've been fully standards compliant with a perfect Autobahn|Testsuite score since 2016. Companies with everything to lose rely on µWebSockets on a daily basis - we power the trading APIs of Bitfinex.com & Kraken.com, handling volumes of multiple billions of USD every day. Other companies include Trello, where µWebSockets is serving their 50 million users with real-time board updates.
    Downloads: 7 This Week
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  • 8 Monitoring Tools in One APM. Install in 5 Minutes. Icon
    8 Monitoring Tools in One APM. Install in 5 Minutes.

    Errors, performance, logs, uptime, hosts, anomalies, dashboards, and check-ins. One interface.

    AppSignal works out of the box for Ruby, Elixir, Node.js, Python, and more. 30-day free trial, no credit card required.
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  • 5
    Coolify

    Coolify

    An open-source & self-hostable Heroku / Netlify / Vercel alternative

    Coolify is an open-source & self-hostable alternative to Heroku / Netlify / Vercel / etc. It helps you manage your servers, applications, and databases on your own hardware; you only need an SSH connection. You can manage VPS, Bare Metal, Raspberry PIs, and anything else. Imagine having the ease of a cloud but with your own servers. That is Coolify. No vendor lock-in, which means that all the configurations for your applications/databases/etc are saved to your server. So, if you decide to stop using Coolify, you could still manage your running resources. You lose the automation and all the magic.
    Downloads: 6 This Week
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  • 6
    nuBuilder Forte

    nuBuilder Forte

    nuBuilder Forte is a cloud database builder.

    nuBuilder Forte is the 4th version of nuBuilder. A open-source browser-based tool created for developing web-based database applications. nuBuilder uses either MySQL or MariaDB databases and gives its users the ability to do database operations like... • Search, Create, Insert, Read, Update, Delete ✪ With low-code tools that create ... - Forms with the Form Builder - Fast Reports - Database queries with the SQL Builder - Customised date and number formats with the Format Builder - Calculated fields with the Formula Builder - Email Templates - Move and resize objects. - Further customisation that can be done with JavaScript and PHP. ✪ nuBuilder stores all forms, reports, company data and PHP/JavaScript code in MySQL. You can backup your entire application within a single database file. ✪ Easy installation: - Download and unzip the nuBuilder files - Upload to your webserver - Create a database (e.g. nubuilder4) and optionally a user - Make a copy of
    Downloads: 9 This Week
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  • 7
    Haraka

    Haraka

    A fast, highly extensible, and event driven SMTP server

    Haraka is a highly scalable node.js email server with a modular plugin architecture. Haraka can serve thousands of concurrent connections and deliver thousands of messages per second. Haraka and plugins are written in asynchronous JS and are very fast. Haraka has very good spam protection (see plugins) and works well as a filtering MTA. It also works well as a MSA running on port 587 with auth and dkim_sign plugins enabled. Haraka makes no attempt to be a mail store (like Exchange or Postfix/Exim/Qmail), a LDA, nor an IMAP server (like Dovecot or Courier). Haraka is typically used with such systems. Haraka has a scalable outbound mail delivery engine built in. Mail marked as relaying (such as via an auth plugin) is automatically queued for outbound delivery. Haraka's plugin architecture provides an easily extensible MTA that complements traditional MTAs that excel at managing mail stores but do not have sufficient filtering.
    Downloads: 1 This Week
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  • 8
    Muduo

    Muduo

    Event-driven network library for multi-threaded Linux server in C++11

    Muduo is a multithreaded C++ network library based on the reactor pattern. Use of this source code is governed by a BSD-style license that can be found in the License file. Requires Linux kernel version equal or above 2.6.28. Tested on Debian 7 and above, Unbuntu 14.04 and above, and CentOS 7 and above. Install required packages Debian, Ubuntu, etc. See .travis.yml for additional packages for building more examples.
    Downloads: 1 This Week
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  • 9
    Origin

    Origin

    Community Distribution of Kubernetes

    Origin, also known as OKD is the community distribution of Kubernetes that has been optimized for continuous application development and multi-tenant deployment. It adds developer and operations-centred tools to Kubernetes to speed up application development and simplify deployment, scaling, as well as long-term lifecycle maintenance. It also makes it easier to launch Kubernetes on any cloud or bare metal and run and update clusters, while providing all the necessary tools for creating successful containerized applications.
    Downloads: 1 This Week
    Last Update:
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    Try Google Cloud Risk-Free With $300 in Credit

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    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
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  • 10
    lixa

    lixa

    LIXA, LIbre XA, is a free and open source XA transaction manager

    LIXA (LIbre XA) is an open source and free Transaction Manager implementing the distributed transaction processing "XA specification" and "TX (transaction demarcation) specification" according to the X/Open CAE Specification. LIXA implements even XTA: XA Transaction API, an innovative API that implements XA transactional context passing among different applications. LIXA is a Transaction Manager but it's not a Transaction Monitor: this is the distinguishing feature of the project. LIXA technology enables every application container, like a web server or a shell, to become a two phase commit application server. The client/server architecture of LIXA allows many application containers to share a single LIXA (state) server: this is ideal when horizontal scalability is a must and many identical application containers must refer to a single transactional environment. LIXA can be used with the C, C++, Java, Python and COBOL programming languages.
    Downloads: 4 This Week
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  • 11
    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
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  • 12
    Service for automatic execution of arbitrary Groovy scripts by scheduler (Quartz) in context of JBoss Application Server + Quartz GUI
    Downloads: 1 This Week
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  • 13
    E-w0rm | PHP Shell
    E-w0rm : is a powerfull shell with handy features like : file manager , password change , database manager , bind shell , remote shell , remote upload , edit , chmod , delete , make , autoroot , php code execution , server command execution , process manager ... You can also change theme ! And " E-w0rm " brought to you by : Epic Hackers S.C Scan : https://goo.gl/718BkD
    Downloads: 1 This Week
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  • 14
    A windows based simulator for a real multimedia message service center.
    Downloads: 1 This Week
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  • 15
    AWS IoT Device SDK v2 for Python

    AWS IoT Device SDK v2 for Python

    Next generation AWS IoT Client SDK for Python

    Next-generation AWS IoT Client SDK for Python using the AWS Common Runtime. This document provides information about the AWS IoT Device SDK v2 for Python. This SDK is built on the AWS Common Runtime, a collection of libraries (aws-c-common, aws-c-io, aws-c-mqtt, aws-c-compression, aws-c-http, aws-c-cal, aws-c-auth, s2n ...) written in C to be cross-platform, high-performance, secure, and reliable. The libraries are bound to Python by the awscrt package (PyPI). AWS IoT provides the cloud services that connect your IoT devices to other devices and AWS cloud services. AWS IoT provides device software that can help you integrate your IoT devices into AWS IoT-based solutions. If your devices can connect to AWS IoT, AWS IoT can connect them to the cloud services that AWS provides. AWS IoT lets you select the most appropriate and up-to-date technologies for your solution.
    Downloads: 0 This Week
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  • 16
    The AWS Toolkit for Eclipse is a plug-in for the Eclipse Java IDE that makes it easier for developers to develop, deploy, and debug Java applications using Amazon Web Services.
    Downloads: 0 This Week
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  • 17
    A knowledgment management system written in Java under JBoss 4.2.3 Server, with richfaces 3.3.0BETA4. Including fileconversion from html to pdf and rich:editor component without special syntaxing.
    Downloads: 0 This Week
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  • 18
    Advanced Send and Receive Sonic MQ C#
    AdvancedSendandReceive is a well featured SonicMQ client application implemented in C# for Sending and Receiving of JMS messages. It was inspired by the work done for BasicSendandReceive C# sonicmq
    Downloads: 0 This Week
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  • 19
    Ambient Composite Engine, a web-based framework for writing composite software, submitted by WebactiveLabs.
    Downloads: 0 This Week
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  • 20
    AnthillaOS

    AnthillaOS

    a linux based readonly image as appliance

    Visit also: https://github.com/Anthilla/AnthillaOS For more updated Informations. Usable as test/dev exercise for appliances An x86 64bit gentoo image customized for readonly usage as appliances, fully functional and complete of more than 1000 pkg based on a gentoo+systemd distro. Hypervisor (kvm or xen) Storage (ZFS and Gluster) Container (Docker) Networking (iproute2, nftable, OpenVSwitch, Bird) Antd (http://www.anthilla.com/en/software/antd/ ) web based management all open source components from other projects are released under respective licenses, all parts, files,subprojects developed as part or this project are released under the BSD 3 clause license.
    Downloads: 0 This Week
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  • 21
    Cloud Target is a front-end to the python scripts that google uses to create, run and upload projects to its App Server system. This .NET application is based on the OSX front-end provided by Google in the SDK.
    Downloads: 0 This Week
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  • 22
    Software designed for the small clinics that they require of a tool to manage and to take a detailed control of his activities including handling of inventories and consultations completely in Spanish.
    Downloads: 0 This Week
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  • 23
    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
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  • 24
    Homebrew Cask

    Homebrew Cask

    CLI workflow for the administration of macOS apps as binaries

    Homebrew installs the stuff you need that Apple (or your Linux system) didn’t. Homebrew installs packages to their own directory and then symlinks their files into /usr/local. Homebrew won’t install files outside its prefix and you can place a Homebrew installation wherever you like. Trivially create your own Homebrew packages. It’s all Git and Ruby underneath, so hack away with the knowledge that you can easily revert your modifications and merge upstream updates. Homebrew formulae are simple Ruby scripts. Homebrew complements macOS (or your Linux system). Install your RubyGems with gem and their dependencies with brew. Homebrew Cask installs macOS apps, fonts and plugins and other non-open source software. Making a cask is as simple as creating a formula.
    Downloads: 0 This Week
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  • 25
    This is a Web Platform for Saas(Software as a service). This program written by java and flex. Any program that written by Java(swing) can excute on the I-riss platfrom.
    Downloads: 0 This Week
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