Browse free open source System software and projects for Linux and Desktop Operating Systems 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
    Double Commander
    Double Commander is a cross platform open source file manager with two panels side by side. It is inspired by Total Commander and features some new ideas.
    Leader badge
    Downloads: 6,526 This Week
    Last Update:
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  • 2
    log4cplus

    log4cplus

    Logging Framework for C++

    log4cplus is a simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. It is modelled after the Java log4j API.
    Leader badge
    Downloads: 4,040 This Week
    Last Update:
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  • 3
    VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption. It supports IP, Ethernet, PPP and other tunnel types. VTun is easily and highly configurable. VPN, Mobile IP, Shaping, etc
    Leader badge
    Downloads: 7,873 This Week
    Last Update:
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  • 4

    UFTP

    Encrypted UDP based FTP with multicast

    UFTP is an encrypted multicast file transfer program, designed to securely, reliably, and efficiently transfer files to multiple receivers simultaneously. This is useful for distributing large files to a large number of receivers, and is especially useful for data distribution over a satellite link (with two way communication), where the inherent delay makes any TCP based communication highly inefficient. The multicast encryption scheme is based on TLS with extensions to allow multiple receivers to share a common key. UFTP also has the capability to communicate over disjoint networks separated by one or more firewalls (NAT traversal) and without full end-to-end multicast capability (multicast tunneling) through the use of a UFTP proxy server. These proxies also provide scalability by aggregating responses from a group of receivers.
    Leader badge
    Downloads: 1,138 This Week
    Last Update:
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  • 5
    duply (simple duplicity)
    Duply is a shell front end for the duplicity backup tool https://duplicity.us . It simplifies the usage by implementing backup job profiles, batch commands and more. Secure backup to non-trusted file spaces made easy.
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    Downloads: 129 This Week
    Last Update:
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  • 6
    libivykis is a thin wrapper over various OS'es implementation of I/O readiness notification facilities (such as poll(2), kqueue(2)) and is mainly intended for writing portable high-performance network servers.
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    Downloads: 432 This Week
    Last Update:
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  • 7
    This project implements a simple STUN server and client on Windows, Linux, and Solaris. The STUN protocol (Simple Traversal of UDP through NATs) is described in the IETF RFC 3489, available at http://www.ietf.org/rfc/rfc3489.txt
    Downloads: 61 This Week
    Last Update:
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  • 8
    syslog-ng

    syslog-ng

    Log management solution that improves the performance of SIEM

    syslog-ng is the log management solution that improves the performance of your SIEM solution by reducing the amount and improving the quality of data feeding your SIEM. With syslog-ng Store Box, you can find the answer. Search billions of logs in seconds using full text queries with Boolean operators to pinpoint critical logs. syslog-ng Store Box provides secure, tamper-proof storage and custom reporting to demonstrate compliance. syslog-ng can deliver data from a wide variety of sources to Hadoop, Elasticsearch, MongoDB, and Kafka as well as many others. syslog-ng flexibly routes log data from X sources to Y destinations. Instead of deploying multiple agents on hosts, organizations can unify their log data collection and management. syslog-ng Store Box provides automated archiving, tamper-proof encrypted storage, granular access controls to protect log data. The largest appliance can store up to 10TB of raw logs.
    Downloads: 10 This Week
    Last Update:
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  • 9
    Tracks usage of TCP/IP network subnets and builds html files with graphs to display utilization. Charts are built by individual ip. Color Codes HTTP, TCP,UDP, ICMP, VPN, P2P, etc. Click on the release notes icon for the latest release for more info.
    Downloads: 37 This Week
    Last Update:
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  • 10
    Libnids - NIDS E-component, based on Linux kernel. This library provides IP defragmentation, TCP reassembly and port scan detection.
    Downloads: 46 This Week
    Last Update:
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  • 11
    filerunner
    FileRunner is a two pane file manager for Unix and Unix like systems. It is simple and efficient and has a built-in FTP and SFTP client. It also does a reasonable (and improving) job on Windows systems. New and improved from a FileRunner of long ago.
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    Downloads: 18 This Week
    Last Update:
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  • 12

    tcpreplay

    edit and replay captured network traffic

    tcpreplay is a suite of tools to edit and replay captured network traffic.
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    Downloads: 41 This Week
    Last Update:
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  • 13

    Ganglia

    Scalable, distributed monitoring system for high-performance computing

    Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters. Supports clusters up to 2000 nodes in size.
    Downloads: 9 This Week
    Last Update:
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  • 14
    jpcap is a set of Java classes which provide an interface and system for network packet capture. A protocol library and tool for visualizing network traffic is included. jpcap utilizes libpcap, a widely deployed system library for packet capture.
    Downloads: 9 This Week
    Last Update:
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  • 15
    YPOPs! is an application which emulates a POP3/SMTP mail server and provides free POP3 and SMTP access to Yahoo! Mail. It does not depend on Yahoo's POP3/SMTP mail server. You can use a mail client of your choice!
    Downloads: 4 This Week
    Last Update:
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  • 16
    tsocks provides transparent network access through a SOCKS version 4 or 5 proxy (usually on a firewall). tsocks intercepts the calls applications make to establish TCP connections and transparently proxies them as necessary.
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    Downloads: 20 This Week
    Last Update:
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  • 17
    XDM

    XDM

    The Fork of Orginal XDM, The Best Open Source Download Manager

    The fork of Xtereme Download manager that it's page is in https://sourceforge.net/projects/xdman/?source=directory, has more features, for some informations go to http://ubuntuone.com/3dvE3Z0ZC8H1sBCca9zqpv Brought you by Subhra Das Gupta and Ali Torabi . Please use orginal and the forked to compare both
    Leader badge
    Downloads: 5 This Week
    Last Update:
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  • 18
    Stuntman - STUN server and client

    Stuntman - STUN server and client

    High performance, production quality STUN server and client library

    New version 1.2. This is the code to STUNTMAN - an open source STUN server and client code by john selbie. Compliant with the latest RFCs including 5389, 5769, and 5780. Also includes backwards compatibility for RFC 3489. ICE and WebRTC ready. Version 1.2 compiles on Linux, MacOS, BSD, and Solaris. Supports the STUN protocol on both UDP and TCP for both IPv4 and IPv6. Windows binaries are also provided. Additional features are in development. This is a mirror of the code on https://github.com/jselbie/stunserver More details on the project's website: http://www.stunprotocol.org
    Leader badge
    Downloads: 11 This Week
    Last Update:
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  • 19
    The program thrulay is used to measure the capacity, delay, and other performance metrics of a network by sending a bulk TCP or UDP stream over it.
    Downloads: 6 This Week
    Last Update:
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  • 20
    IEs 4 Linux installs Microsoft Internet Explorer 6, 5.5 and 5.0 on Linux using Wine without any click
    Downloads: 8 This Week
    Last Update:
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  • 21
    A Free SOCKS proxy server for Linux, macos and FreeBSD
    Downloads: 9 This Week
    Last Update:
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  • 22
    NETI@home collects network performance statistics from end-systems, but is NOT SPYWARE. These statistics will be sent to Georgia Tech where they will be made publicly available, giving researchers needed data on the end-to-end performance of the Internet
    Downloads: 7 This Week
    Last Update:
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  • 23
    raddump interprets captured RADIUS packets to print a timestamp, packet length, RADIUS packet type, source and destination hosts and ports, and included attribute names and values for each packet.
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    Downloads: 6 This Week
    Last Update:
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  • 24
    UpClient Logs uptime with uptimes.wonko.com. UpClient sends the time a computer has been running since its last reboot to the Uptimes Project. The server generates individual & aggregate statistics of various operating system & hardware configurations.
    Downloads: 4 This Week
    Last Update:
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  • 25
    The Nemesis Project is designed to be a command line based, portable human IP stack for UNIX-like and Windows systems. The suite is broken down by protocol, and should allow for useful scripting of injected packets from simple shell scripts.
    Downloads: 2 This Week
    Last Update:
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