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.

  • Our Free Plans just got better! | Auth0 Icon
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  • Automate contact and company data extraction Icon
    Automate contact and company data extraction

    Build lead generation pipelines that pull emails, phone numbers, and company details from directories, maps, social platforms. Full API access.

    Generate leads at scale without building or maintaining scrapers. Use 10,000+ ready-made tools that handle authentication, pagination, and anti-bot protection. Pull data from business directories, social profiles, and public sources, then export to your CRM or database via API. Schedule recurring extractions, enrich existing datasets, and integrate with your workflows.
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  • 1
    Angry IP Scanner

    Angry IP Scanner

    A cross-platform network scanner that is fast and simple to use

    Angry IP scanner is fast and friendly network scanner for Windows, Linux, and Mac. It is very extensible, allowing it to be used for very wide range of purposes, with the primary goal of being useful to network administrators.
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    Downloads: 2,998 This Week
    Last Update:
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  • 2

    The GNU netcat

    The networking swiss army knife

    A rewrite of the well-known networking tool, but more portable, with new features and fully GNU compliant.
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    Downloads: 4,316 This Week
    Last Update:
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  • 3
    WFDownloader App

    WFDownloader App

    Free batch downloader for image, wallpaper, video, audio, document,

    Use as an image gallery, wallpaper, audio/music, video, document, and other media bulk downloader from supported websites. Also use to download sequential website urls that have a certain pattern (e.g. image01.png to image100.png). Also use app's built-in site crawler for advanced link search or extraction. There is also special support for forum media and open directory downloading. It's a programmable downloader and also works with password protected sites. Say goodbye to downloading one by one. Go to the Help menu or check out website to get started. Note that this cross-platform version requires Java (minimum version Java 8) to be installed on your Operating System. For non-java required OS specific versions, check app's website.
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    Downloads: 294 This Week
    Last Update:
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  • 4
    CLucene is a C++ port of Lucene: the high-performance, full-featured text search engine written in Java. CLucene is faster than lucene as it is written in C++.
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    Downloads: 138 This Week
    Last Update:
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  • Boon: The Agile Referral Hiring Platform Icon
    Boon: The Agile Referral Hiring Platform

    Tap your entire community to hire better talent, faster

    Boon's agile referral platform expands your recruiting power 
through AI, automation, integrations, and gamification.
    Learn More
  • 5
    Antinat is a flexible SOCKS server and client library for writing proxy-based applications. It supports SOCKS 4, SOCKS 5, authentication, CHAP, XML firewalling, Win32, server chaining, and UDP. It also contains very experimental IPv6 support.
    Downloads: 546 This Week
    Last Update:
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  • 6
    c-icap is an implementation of an ICAP server. It can be used with HTTP proxies that support the ICAP protocol such as the Squid 3.x HTTP proxy server to implement content adaptation/filtering services.
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    Downloads: 183 This Week
    Last Update:
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  • 7
    AirSnort is a wireless LAN (WLAN) tool which cracks encryption keys on 802.11b WEP networks. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered.
    Downloads: 75 This Week
    Last Update:
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  • 8
    aMule AdunanzA
    aMule AdunanzA e' un progetto volto a rendere accessibile la rete Kademlia anche all'utenza Fastweb, grazie alla patch AdunanzA. Questo in specifico per utenti Linux e Mac OS X Per riferimenti alla community italiana http://forum.adunanza.net
    Downloads: 46 This Week
    Last Update:
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  • 9
    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: 31 This Week
    Last Update:
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  • Knowledge Is The Cornerstone Of Your Business. Icon
    Knowledge Is The Cornerstone Of Your Business.

    MentorCity works best for associations, companies, and schools

    MentorCity is a comprehensive and intuitive online mentoring software cultivating the future of organizations and individuals through the power of connections and relationships. Specifically created for associations, companies, and schools, MentorCity assists in member engagement, leadership development, succession planning, and diversity and inclusion strategies. Serving as a powerful personal development tool, MentorCity helps organizations save time and money by lessening matching responsibilities and allowing program administrator to focus their efforts on building a mentoring culture that achieves exceptional results.
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  • 10
    tcpick is a textmode sniffer; it tracks tcp streams, shows the status, reassembles and saves the data captured in files or displays them in the terminal in different modes (ascii, hex..). There is a color-mode. Useful to get files passively.
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    Downloads: 48 This Week
    Last Update:
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  • 11
    ljArchive is a tool for downloading, browsing, and analyzing journal entries and comments from LiveJournal (or LiveJournal clones).
    Downloads: 25 This Week
    Last Update:
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  • 12
    FullSync

    FullSync

    Easy file synchronization for everyone

    FullSync is a powerful tool that helps you keep multiple copies of various data in sync. I.e. it can update your Website using (S)Ftp, backup your data or refresh a working copy from a remote server. It offers flexible rules, a scheduler and more
    Downloads: 13 This Week
    Last Update:
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  • 13
    AWGG

    AWGG

    AWGG Advanced WGet GUI

    AWGG comes from Advanced Wget GUI. AWGG is a lightweight multiplatform and multilanguage download manager, basically a wget frontend and other tools like aria2, curl, youtube-dl and axel. AWGG is written in Free Pascal , using CodeTyphon and Lazarus IDE.
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    Downloads: 18 This Week
    Last Update:
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  • 14
    HTB.init is a shell script derived from CBQ.init that allows for easy setup of HTB-based traffic control on Linux. HTB (Hierachical Token Bucket) is a new queueing discipline which attempts to address the weaknesses of current CBQ implementation.
    Downloads: 10 This Week
    Last Update:
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  • 15
    Simplebackup is a cross-platform backup program. It reads a configuration file then builds a compress backup set, finally places the compressed files into another location (a directory, a remote http,ftp,sftp server or even one or more email accounts).
    Downloads: 24 This Week
    Last Update:
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  • 16
    The archive-crawler project is building Heritrix: a flexible, extensible, robust, and scalable web crawler capable of fetching, archiving, and analyzing the full diversity and breadth of internet-accesible content.
    Downloads: 7 This Week
    Last Update:
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  • 17
    DenyHosts is a python program that automatically blocks ssh attacks by adding entries to /etc/hosts.deny. DenyHosts will also inform Linux administrators about offending hosts, attacked users and suspicious logins. This project is being actively developed on GitHub (https://github.com/denyhosts)
    Downloads: 6 This Week
    Last Update:
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  • 18
    wxDownload Fast is a multi-platform download manager. It downloads faster by getting segments from multiple locations at the same time. It was created in C++ using the wxWidgets library. ALERT: There is a malware using the name wxdownload (or wxdownloadmanager). The malware site use some of the original screenshots and texts. Be carefully. The wxDownload Fast original files are aways hosted in SourceForge.net.
    Downloads: 8 This Week
    Last Update:
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  • 19
    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: 8 This Week
    Last Update:
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  • 20
    Arisen Studio

    Arisen Studio

    Browse, Download and Install Mods for PlayStation 3 & Xbox 360

    The elegant, powerful, and open-source mod manager. Arisen Studio allows you to easily browse through a regularly updated database of mods, game saves, homebrew, resources, themes, and much more for the PlayStation 3 and Xbox 360. All mods have been tested and verified in our library, which is populated by myself, a few friends, and awesome contributors. Arisen Studio can also be used as an FTP client to install and uninstall mods directly from your console. Without the need to search up old posts or use file managers - this will do everything for you.
    Downloads: 6 This Week
    Last Update:
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  • 21
    A portable, modular and efficient ftp server, supporting SSL, IPv6, UTF-8 compliant, multithreaded, modules ,externals scripts. unix-like permissions+acls, virtual users/groups, security, speed, bandwith limitation (user,group,global), group admins, per
    Leader badge
    Downloads: 21 This Week
    Last Update:
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  • 22
    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: 11 This Week
    Last Update:
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  • 23
    Cub Linux

    Cub Linux

    Chromium + Ubuntu = Cub Linux

    The best of Chromium and Ubuntu. Cub Linux is a project to replicate the Chromium OS experience on an Ubuntu Linux base system. Cub Linux is free to download and use forever.
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    Downloads: 18 This Week
    Last Update:
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  • 24
    A general purpose implementation of the xmlrpc specification in C.
    Leader badge
    Downloads: 9 This Week
    Last Update:
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  • 25

    qtmib

    SNMP MIB Browser for Linux platforms

    qtmib is an easy-to-use SNMP MIB Browser based on QT4 library. It is build as a front-end for net-snmp tools, and it allows the user to query any SNMP enabled device. It supports SNMPv1 and SNMPv2c. qtmib is released under GPL v2 license.
    Downloads: 8 This Week
    Last Update:
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