Browse free open source System software and projects for Linux below. Use the toggles on the left to filter open source System software by OS, license, language, programming language, and project status.

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  • 1
    HP Linux Imaging and Printing

    HP Linux Imaging and Printing

    Hewlett-Packard's Linux imaging and printing software

    The Hewlett-Packard Linux Imaging and Printing Project provides a unified single and multi-function connectivity solution for Linux. For support and help, please visit https://launchpad.net/hplip
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    Downloads: 7,009 This Week
    Last Update:
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  • 2
    MailHog

    MailHog

    Web and API based SMTP testing

    Inspired by MailCatcher, easier to install. Built with Go, MailHog runs without installation on multiple platforms. Run it from Docker Hub or using the provided Dockerfile. The SMTP server starts on port 1025, the HTTP server starts on port 8025, in-memory message storage. ESMTP server implementing RFC5321. Support for SMTP AUTH (RFC4954) and PIPELINING (RFC2920). Web interface to view messages (plain text, HTML or source). Supports RFC2047 encoded headers. Real-time updates using EventSource. Release messages to real SMTP servers. Chaos Monkey for failure testing. HTTP API to list, retrieve and delete messages. See APIv1 and APIv2 documentation for more information. HTTP basic authentication for MailHog UI and API. Multipart MIME support. Download individual MIME parts. In-memory message storage. MongoDB and file based storage for message persistence. Lightweight and portable. No installation required.
    Downloads: 80 This Week
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  • 3
    Motrix

    Motrix

    A full-featured download manager

    Motrix is a full-featured, cross-platform download manager that supports downloading HTTP, FTP, BitTorrent, Magnet, Baidu Net Disk and more. It’s got an interface that’s clean, simple and easy to use, plus a number of great features. It can handle up to 10 concurrent downloads, can support 64 threads in a single task, support speed limit and more! It comes in both Chinese and English with many other translations in the works, and has dark mode available.
    Downloads: 53 This Week
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  • 4
    MQTTnet

    MQTTnet

    High performance .NET library for MQTT based communication

    MQTTnet is a high-performance .NET library for MQTT-based communication. It provides an MQTT client and an MQTT server (broker) and supports the MQTT protocol up to version 5. TLS support for client and server (but not UWP servers). Extensible communication channels (e.g. In-Memory, TCP, TCP+TLS, WS). Lightweight (only the low-level implementation of MQTT, no overhead). Performance optimized (processing ~150.000 messages/second). Uniform API across all supported versions of the MQTT protocol. Tested on the local machine (Intel i7 8700K) with MQTTnet client and server running in the same process using the TCP channel. The app for verification is part of this repository and stored in /Tests/MQTTnet.TestApp.NetCore. List of connected clients available. Supports connected clients with different protocol versions at the same time. Able to publish its own messages (no loopback client required). Able to receive every message (no loopback client required).
    Downloads: 6 This Week
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  • 5
    WiFiManager

    WiFiManager

    WiFi Connection manager with web captive portal

    Espressif ESPx WiFi Connection manager with fallback web configuration portal. The configuration portal is of the captive variety, so on various devices it will present the configuration dialogue as soon as you connect to the created access point. When your ESP starts up, it sets it up in Station mode and tries to connect to a previously saved Access Point. If this is unsuccessful (or no previous network saved) it moves the ESP into Access Point mode and spins up a DNS and WebServer (default ip 192.168.4.1). Using any wifi enabled device with a browser (computer, phone, tablet) connect to the newly created Access Point. Because of the Captive Portal and the DNS server you will either get a 'Join to network' type of popup or get any domain you try to access redirected to the configuration portal. ESP will try to connect. If successful, it relinquishes control back to your app. If not, reconnect to AP and reconfigure.
    Downloads: 6 This Week
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  • 6
    Easy-HotSpot

    Easy-HotSpot

    A super easy WiFi hotspot user management utility for Mikrotik router

    Easy HotSpot, A super easy WiFi hotspot user management utility for Mikrotik RouterOS based Router devices and works using the PHP PEAR2 API client by boenrobot. This PHP/MySql/Bootstrap based package can be installed in any supporting OS in a local webserver of the client or in any internet based webservers of choice. Put the contents/source code in the root or in a sub folder of the host/domain, as required. A MySql database need to be created in order to work, but the package will create the database, if one doesn't exist on initialisation. The details of the database need to be given in the dbconfig.php file by editing it. The details of the router device also need to be entered in the config.php file prior to operations. A preliminary visual documentation is available at http://hotspot.zetozone.com Easy HotSpot is suitable for WiFi hotspots of any size and capacity, but equipped with a MikroTik routerOS based device.
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    Downloads: 9 This Week
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  • 7
    A suite of software tools written in Java for authoring and delivery of IMS standard-compliant learning objects. *** This site only contains the source code. For the binaries go to http://www.reload.ac.uk ***
    Downloads: 8 This Week
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  • 8
    ByteSync

    ByteSync

    All-in-One Sync, Backup & Deduplication Tool

    ByteSync is a powerful open-source tool for remote file comparison and synchronization, designed to transfer only what truly matters: the differences. Whether you're syncing large files, backing up remote folders, or handling extensive sets of small files, ByteSync delivers speed, security, and efficiency—without unnecessary data transfers. Compatible with Windows, macOS, and Linux, ByteSync leverages cloud-based orchestration with end-to-end encryption, eliminating the need for VPNs or firewall configurations. No continuous background syncing, no bloat—just fast, on-demand file synchronization between remote devices.
    Downloads: 4 This Week
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  • 9
    Lucifer

    Lucifer

    Lucifer: The Ultimate Dev-Ecosystem

    "Everything is integrated. Now, even I can't control it." 루시퍼(Lucifer)는 더 이상 단순한 런처가 아닙니다. 개발자가 필요로 하는 모든 하부 구조를 하나로 집대성한, 통제 불가능한 수준의 올인원 통합 제어 환경입니다. 🚀 핵심 특징 (Core Features) 시리얼 제어 (Advanced Serial Control): 하드웨어와의 접점을 완벽하게 장악합니다. 아두이노 및 각종 임베디드 장치와의 데이터 송수신을 가장 드라이하고 정밀하게 수행합니다. 서버 통합 (Terra Server Engine): MariaDB 연동형 고성능 자바 서버 '테라(Terra)'를 코어로 품어, 데이터 처리와 로직 실행의 중심축을 담당합니다. 톰캣 내장 (Embedded Tomcat): 별도의 WAS 설치 없이도 웹 환경을 즉각적으로 구동합니다. 루시퍼가 곧 웹 서버이자 플랫폼이 됩니다. 자바 내장 (Portable Java Environment): 환경 변수 설정이나 버전 갈등에서 완전히 자유롭습니다. 루시퍼 실행 파일 하나에 최적화된 자바 환경이 포함되어 어디서든 즉시 가동됩니다.
    Downloads: 3 This Week
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  • 10

    8N1Term

    High-speed serial terminal for embedded systems and protocol analysis

    High-throughput serial capture without dropped data. Real-time plotting and visual inspection of incoming data. Combined ASCII / HEX views suitable for low-level debugging. Multi-window workflows for parallel monitoring. Cross-platform support (Windows, Linux).
    Downloads: 2 This Week
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  • 11
    Java Download Manager

    Java Download Manager

    A Download Manager in Java for Desktop

    A Download Manager in Java for Desktop
    Downloads: 1 This Week
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  • 12
    Votorola is e-democracy software in support of primary elections and rule making. We provide the tools to enable a participatory democracy based on public deliberation, collaborative drafting and free voting.
    Downloads: 1 This Week
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  • 13
    bluebox linux

    bluebox linux

    BLUEBOX Linux & Blockchain FAST & EASY

    Bluebox Linux is a new distribution based on stable ubuntu releases and using debian packages especially focused on new blockchain and linux users.Enjoy now the pre-installed programs and wallets and the security and privacy reinforcements built by default in the minimum possible space for use with or without installation
    Downloads: 1 This Week
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  • 14
    fs3
    fs3 is an Amazon S3 compatible client and server implementation enabling centralized file storage web services ideal for multi-server applications. Users can develop potential S3-based applications using only a typical Apache-PHP environment.
    Downloads: 1 This Week
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  • 15
    SerialPortNet is an open source serial port communication library for Microsoft .NET. It's written in c#, implements complete .NET 2.0 specifications, and is designed to allow for multiple OSes and add-on 3rd party Serial to Network adapters.
    Downloads: 0 This Week
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  • 16
    AsyncWcfLib

    AsyncWcfLib

    Actor based programming using WCF and async-await.

    Note: There is a successor of AsyncWcfLib: https://github.com/steforster/Remact.Net AsyncWcfLib is a software library for distributed computing based on Microsoft WCF. AsyncWcfLib is a lightweight message bus bridging Windows and Linux by using the .NET Framework or Mono. It supports callback based asynchrony as well as the new async-await pattern available in .NET 4.5. AsyncWcfLib supports threadsafety through an actor based programming model. Actors are loosly coupled system units interacting by passing messages. Message objects are passed inside a process between actors running on different threads. Also, messages may be passed between actors running on different processes, hosts and operating systems. The library is designed for configuration free, asynchronous messaging. A router application is included. It discovers actors by their name on any linked host, even when host name resolution is not possible because of routing- or operating system limitations.
    Downloads: 0 This Week
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  • 17
    The BCR flavor of Cooperative Data Sharing (CDS) is a scalable, portable, flexible C-based API and daemon for initiating and communicating between processes/threads in uniprocessor and multiprocessor (e.g. distributed, SMP, and parallel) platforms.
    Downloads: 0 This Week
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  • 18
    A Java userland file synchronization program that runs as a daemon. Designed synchronize between many systems simultaneously. Builds a minimal spanning tree for bandwidth efficient update distribution.
    Downloads: 0 This Week
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  • 19
    HP and Open Source
    Downloads: 0 This Week
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  • 20
    IPFS RPi

    IPFS RPi

    IPFS installer for the Raspberry Pi and other ARM-based devices

    A bare-bones IPFS installer for the Raspberry Pi and other ARM-based devices. Log into your system with an administrator account, like the default OS user. For example, on the Raspberry Pi, most operating systems will default to the pi user, whereas on the Orange Pi that's going to be orangepi. You can find a lot of information on how to use IPFS on the official website. If you just want to test whether the installation was successful or not, you can list your node's peers. The IPFS daemon needs to be running in order for your IPFS node to appear online. The installer already takes care of running the daemon on system startup by default, but if you want to control that process manually, you can use the operating system's init system directly.
    Downloads: 0 This Week
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  • 21
    JFIPA is intended to be a scalable, easy-to-deploy router and parser of messages between agents using the FIPA Agent Communication Language represented as XML
    Downloads: 0 This Week
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  • 22
    LSJ-Link

    LSJ-Link

    시리얼 통신 프로그램 (Serial Control Program)

    [Summary / 한글 설명] LSJ-Link는 개발자와 엔지니어를 위한 직관적인 시리얼 통신 터미널 프로그램입니다. 아두이노(Arduino), 임베디드 보드와의 안정적인 데이터 송수신을 지원하며, 복잡한 설정 없이도 즉각적으로 하드웨어를 제어할 수 있도록 설계되었습니다. 루시퍼(Lucifer) 런처의 핵심 통신 엔진을 독립형 버전으로 만나보세요. [Key Features / 주요 기능] Instant Connectivity: 간단한 포트 및 보드레이트(Baud rate) 설정으로 즉시 연결 가능. Real-time Monitoring: 송수신 데이터를 실시간 로그창으로 확인. Lightweight & Fast: 군더더기 없는 로직으로 시스템 자원 점유율 최소화. User-friendly Interface: 직관적인 UI로 초보자부터 전문가까지 쉽게 사용. [Short Description (영문 요약)] LSJ-Link is a high-performance serial communication tool designed for developers working with Arduino and embedded systems. Experience stable data transmission and real-time monitoring with a simple, intuitive interface.
    Downloads: 0 This Week
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  • 23
    LinuxOffice360

    LinuxOffice360

    A universal desktop operating system.

    It is an operating system designed for small businesses and offices. Very nice to look at and simple to use, whether you come from Linux, Windows or Mac. Without unnecessary frills, it is equipped with all the necessary software to start working even live. You will find everything in the right place and above all where you expect it to be. The learning curve is lightning fast and you will be productive right away. Linux Ham Radio Office 360 A complete suite of software for the amateur radio Rig Control with full command support for Yaesu, ICOM, Kenwood, Elecraft, Ten-Tec, FlexRadio etc. QSO logging, supports DXing, monitoring and integration of digital modes with WSJT-X, digital modes for RTTY, PSK31 and many more. Rotator control for azimuth and azimuth/elevation rotors from Yaesu, HyGain, Green Heron, M2, AlfaSpid, Easycom, Idiom Press, Fox Delta. Satellite communications with facility frequency adjustment for Doppler and az/el tracking of antennas . GPL Software License.
    Downloads: 0 This Week
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  • 24
    The Local Content Server transforms Plone into a robust Learning Object Repository. It supports IMS content package transport, content preview, and object identification and registration.
    Downloads: 0 This Week
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  • 25

    MECT

    MANEATER CLOUD TECHNOLOGY

    a lightweight, cloud based, information software system designed to help effectively mitigate the managing of bad clams and man-eaters!
    Downloads: 0 This Week
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