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

  • Save Up to 91% on Cloud Compute With Spot VMs Icon
    Save Up to 91% on Cloud Compute With Spot VMs

    Automatic sustained-use discounts. One free VM per month. No negotiation needed.

    Run batch jobs at 60-91% off with Spot VMs. Long-running workloads get automatic discounts with sustained use.
    Start Free
  • Paessler - Monitor Your Whole Network in Minutes Icon
    Paessler - Monitor Your Whole Network in Minutes

    Auto-discovery finds your devices and deploys pre-configured sensors instantly. No project plan required, just visibility from day one.

    Waiting weeks for a monitoring rollout isn't an option when infrastructure doesn't stop running. PRTG's auto-discovery scans your network and suggests from over 200 pre-configured sensor types, so you're watching servers, applications and devices within minutes, not after a multi-week deployment. Enterprise-strength monitoring, without the enterprise complexity. Start your free trial today.
    Start Free 30-Day Trial
  • 1
    pdfcrack is a command line, password recovery tool for PDF-files.
    Leader badge
    Downloads: 477 This Week
    Last Update:
    See Project
  • 2
    FLAC is a free lossless compressed audio format which supports streaming and archival. The FLAC project maintains the format and provides a reference encoder/decoder and input plugins for several popular audio players.
    Leader badge
    Downloads: 217 This Week
    Last Update:
    See Project
  • 3
    xrdp

    xrdp

    An open source RDP server

    xrdp provides a graphical login to remote machines using RDP (Microsoft Remote Desktop Protocol). xrdp accepts connections from a variety of RDP clients: FreeRDP, rdesktop, NeutrinoRDP and Microsoft Remote Desktop Client (for Windows, macOS, iOS and Android). As Windows-to-Windows Remote Desktop can, xrdp supports not only graphics remoting but also two-way clipboard transfer (text, bitmap, file), audio redirection, drive redirection (mount local client drives on a remote machine). Connect to a Linux desktop using RDP from anywhere (requires xorgxrdp Xorg module). Reconnect to an existing session. Session resizing (both on-connect and on-the-fly). RDP/VNC proxy (connect to another RDP/VNC server via xrdp). xrdp primarily targets GNU/Linux operating system. x86 (including x86-64) and ARM processors are most mature architecture to run xrdp on. Most Linux distributions should distribute the latest release of xrdp in their repository.
    Downloads: 43 This Week
    Last Update:
    See Project
  • 4
    The USB/IP Project
    The USB/IP Project aims to develop a general USB device sharing system over IP network. To share USB devices between computers with their full functionality, USB/IP encapsulates USB I/O requests into IP packets and transmits them between computers.
    Leader badge
    Downloads: 98 This Week
    Last Update:
    See Project
  • Build Data Resilience - Take the Assessment Today Icon
    Build Data Resilience - Take the Assessment Today

    Can you recover when it matters most? Take this quick assessment to identify gaps and build greater recovery confidence.

    Is your recovery strategy as strong as you think? Take this quick self-assessment to check your recovery readiness and gain tailored insights. In only 2 minutes, you'll learn where you fall on the recovery readiness scale.
    Take the Assessment
  • 5
    DIET-PC (DIskless Embedded Technology Personal Computer) is a software kitset enabling IT professionals to build an open source GUI appliance based on commodity x86 (PC), PowerPC (Mac) or ARM (handheld) hardware, using an embedded Linux methodology.
    Leader badge
    Downloads: 133 This Week
    Last Update:
    See Project
  • 6
    FRRouting

    FRRouting

    The FRRouting Protocol Suite

    FRRouting (FRR) is a free and open-source Internet routing protocol suite for Linux and Unix platforms. It implements BGP, OSPF, RIP, IS-IS, PIM, LDP, BFD, Babel, PBR, OpenFabric and VRRP, with alpha support for EIGRP and NHRP. FRR’s seamless integration with native Linux/Unix IP networking stacks makes it a general-purpose routing stack applicable to a wide variety of use cases including connecting hosts/VMs/containers to the network, advertising network services, LAN switching and routing Internet access routers, and Internet peering. FRR has its roots in the Quagga project. In fact, it was started by many long-time Quagga developers who combined their efforts to improve on Quagga’s well-established foundation in order to create the best routing protocol stack available. We invite you to participate in the FRRouting community and help shape the future of networking.
    Downloads: 17 This Week
    Last Update:
    See Project
  • 7

    android-backup-processor

    Android adb backup extractor and packer

    Leader badge
    Downloads: 92 This Week
    Last Update:
    See Project
  • 8
    Game Extractor

    Game Extractor

    Open and edit the archive files used in over 5700 games.

    Reads and writes archives used in many popular games. Great for mod development and game translations. Supports over 5700 games, with more games added through small plugins. Also shows file previews and converts them to different formats.
    Leader badge
    Downloads: 321 This Week
    Last Update:
    See Project
  • 9
    UltraJSON

    UltraJSON

    Ultra fast JSON decoder and encoder written in C with Python bindings

    UltraJSON is an ultra-fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. May be used as a drop-in replacement for most other JSON parsers for Python. Used to enable special encoding of "unsafe" HTML characters into safer Unicode sequences. Limits output to ASCII and escapes all extended characters above 127. Default is True. If your end format supports UTF-8, setting this option to false is highly recommended to save space. By default, debugging symbols are stripped on Linux platforms. Setting this environment variable with a value of 1 or True disables this behavior. Users planning to link against an external shared library should be aware of the ABI-compatibility requirements this introduces when upgrading system libraries or copying compiled wheels to other machines.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 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.
    Start Free
  • 10
    Apache Guacamole

    Apache Guacamole

    HTML5 Clientless Remote Desktop

    Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH. We call it clientless because no plugins or client software are required. Thanks to HTML5, once Guacamole is installed on a server, all you need to access your desktops is a web browser.
    Leader badge
    Downloads: 24 This Week
    Last Update:
    See Project
  • 11
    MsQuic

    MsQuic

    Cross-platform, C implementation of the IETF QUIC protocol

    MsQuic is a Microsoft implementation of the IETF QUIC protocol. It is cross-platform, written in C and designed to be a general-purpose QUIC library. MsQuic also has C++ API wrapper classes and exposes interop layers for both Rust and C#. QUIC has many benefits when compared to existing "TLS over TCP" scenarios. MsQuic has several features that differentiate it from other QUIC implementations. Optimized for client and server. Optimized for maximal throughput and minimal latency. Asynchronous IO. Receive side scaling (RSS) support. UDP send and receive coalescing support. All packets are encrypted and handshake is authenticated with TLS 1.3. Parallel streams of (reliable and unreliable) application data. Exchange application data in the first round trip (0-RTT). Improved congestion control and loss recovery. Survives a change in the clients IP address or port. Stateless load balancing.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 12
    HT is a file editor/viewer/analyzer for executables. The goal is to combine the low-level functionality of a debugger and the usability of IDEs. We plan to implement all (hex-)editing features and support of the most important file formats.
    Leader badge
    Downloads: 36 This Week
    Last Update:
    See Project
  • 13

    RecordEditor

    Editor for Fixed Width, Csv and Existing Xml files.

    The RecordEditor is a Data File editor for Flat Files (delimited and fixed field position). It supports Unix / PC / Legacy (e.g. Mainframe) file formats, both Text and binary files. The Editor uses a Record-Layout description to format the files. This is ideal for Fixed width (Text or Binary) files, Cobol Data Files, Mainframe files and complicated Csv files. Cobol Copybooks can be used to format Cobol Data files. As well as an editor, The following utilities are supplied * Formatted Compare * File Copy and reformat Utility * FileWizard this is use to work out the format of a File. It can generally find both Text and binary / packed deicimal fields in a file For Simple Csv you should look at its sister project reCsvEditor. Note: The core Editor code is also used in the "Protocol buffers editor" and "Avro Editor"
    Leader badge
    Downloads: 18 This Week
    Last Update:
    See Project
  • 14
    ZK - Simply Ajax and Mobile
    ZK is an open-source Java framework for building modern web and mobile applications. It enables developers to create rich, interactive UIs using only Java — no JavaScript required. With 200+ Ajax-powered components, event-driven architecture, and support for popular technologies like Spring, Java EE, and JSP/JSF, ZK makes it simple to deliver powerful and user-friendly web applications.
    Downloads: 14 This Week
    Last Update:
    See Project
  • 15
    IRremoteESP8266

    IRremoteESP8266

    Infrared remote library for ESP8266/ESP32

    Infrared remote library for ESP8266/ESP32. Send and receive infrared signals with multiple protocols. This library enables you to send and receive infra-red signals on an ESP8266 or an ESP32 using the Arduino framework using common 940nm IR LEDs and common IR receiver modules. e.g. TSOP{17,22,24,36,38,44,48} demodulators etc. Usage of the library has been slightly changed in v2.0. You will need to change your usage to work with v2.0 and beyond. You can read more about the changes required on our Upgrade to v2.0 page. The library has changed from using constants declared as #define to const with the appropriate naming per the C++ style guide. This may potentially cause old programs to not compile. The most likely externally used #defines have been aliased for limited backward compatibility for projects using the old style. Going forward, only the new constant name style will be supported for new protocol additions.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 16
    PufferPanel

    PufferPanel

    PufferPanel is an open source game server management panel

    The simplest, free, open source game management panel. PufferPanel is an open source game server management panel designed to be easy to use and easy to install. PufferPanel supports Minecraft, Forge, Spigot, Sponge, Source Dedicated Servers, BungeeCord, PocketMine, Forge, and much more. In addition to being a free and open source project, PufferPanel provides an easy-to-use interface for everyone from individual users to large networks or companies. We strive to create a friendly community, and we would love for you to join us.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 17
    ShellCheck

    ShellCheck

    A static analysis tool for shell scripts

    ShellCheck is a GPLv3 tool that provides warnings and possible suggestions for bash/sh shell scripts. ShellCheck finds bugs in your shell scripts. You can cabal, apt, dnf, pkg or brew install it locally right now. ShellCheck highlights and clarifies typical beginner's syntax mistakes and issues that cause a shell to give a cryptic error message. It shows typical intermediate level semantic problems that cause a shell to behave in a abnormally and counter-intuitively. It can also discover ssubtle caveats, corner cases and pitfalls that may cause an user's working script to fail under probable future circumstances. ShellCheck.net is always synchronized to the latest git version, and is the simplest way to give ShellCheck a go.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 18
    TAPClean is a Commodore tape preservation / restoration tool. It will check, repair, and remaster Commodore 64 and VIC 20 TAP or DC2N DMP files (tape images).
    Leader badge
    Downloads: 21 This Week
    Last Update:
    See Project
  • 19
    DROID
    [2014-10-31] This project is obsolete, for latest version (6.1.3) see GitHub https://github.com/digital-preservation/droid (source) and http://www.nationalarchives.gov.uk/information-management/manage-information/preserving-digital-records/droid/ (binary) DROID (Digital Record Object Identification) is an automatic file format identification tool. It is the first in a planned series of tools developed by The National Archives under the umbrella of its PRONOM technical registry service. [2013-01-24] The binary download of the latest version of DROID has now been moved to The National Archives website: http://www.nationalarchives.gov.uk/information-management/projects-and-work/droid.htm The source code for the latest version of DROID remains available via Github: http://digital-preservation.github.com/droid/ [2012-09-07] DROID 6.1 has been released. New project hosting for the project can be found on GitHub: http://digital-preservation.github.com/droid/
    Downloads: 17 This Week
    Last Update:
    See Project
  • 20
    File Checksum Utility

    File Checksum Utility

    Calculate MD5, SHA1, SHA256 and SHA512 Hashes

    This software allows to generate MD (Message Digest) and SHA hashes from a file or files or files in a directory. Checksum is an value calculated from a content of file by special algorithm. You can also verify the file integrity of the downloaded document or program. File Checksum Utility is very easy to use. From the graphical user interface, choose the file from your computer storage. The tool calculate and display checksum values. File Checksum Utility is a free software (Freeware) that is available for use at no monetary cost. It is fully functional for an unlimited time. You can copy and diffuse it without restriction if it's free of charge. The author restricts the rights of the user to modify, make derivative works, or reverse-engineer the software.
    Leader badge
    Downloads: 46 This Week
    Last Update:
    See Project
  • 21
    C++ library for parsing and generating RFC-compliant Uniform Resource Identifiers (URI). Contains classes for URI scheme, authority, path, query, fragment, and the combined URI.
    Downloads: 35 This Week
    Last Update:
    See Project
  • 22
    QxOrm library

    QxOrm library

    C++ Qt ORM (Object Relational Mapping) and ODM library

    QxOrm library is an Object Relational Mapping (ORM) and Object Document Mapper (ODM) database library for C++ Qt developers. QxEntityEditor is a graphic editor for QxOrm library : QxEntityEditor provides a graphic way to manage the data model. QxEntityEditor is multi-platform (available for Windows, Linux, and Mac OS X) and generates native code for all environments, desktop (Windows, Linux, Mac OS X), embedded and mobile (Android, iOS, Windows Phone, Raspberry Pi, etc.). A user manual (documentation) for QxEntityEditor application is available on QxOrm website.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    Talend Spatial Module (aka Spatial Data Integrator or SDI) is an ETL tool for geospatial. Based on Talend Open Studio, input, output and transform geocomponents are available. IO components read/write GIS formats(eg.PostGIS, GeoRSS). Transformers all
    Downloads: 23 This Week
    Last Update:
    See Project
  • 24
    Sesame

    Sesame

    Java RDF Framework

    This project is no longer actively maintained. It is succeeded by the Eclipse RDF4J project, which can be found at GitHub and at http://www.rdf4j.org/. Sesame is a de-facto standard framework for processing RDF data. This includes parsing, scalable storage, reasoning and full SPARQL 1.1 query/update support. Sesame offers a fully modular toolkit and an easy-to-use Java API that can be connected to all leading RDF storage solutions.
    Leader badge
    Downloads: 3 This Week
    Last Update:
    See Project
  • 25

    pcapfix

    repair corrupted pcap and pcapng files

    this tool tries to repair your broken pcap and pcapng files by fixing the global header respectively packet blocks and recovering the packets by searching und guessing the packet headers or blocks
    Downloads: 9 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • 4
  • 5
  • Next