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
    Scrollout F1

    Scrollout F1

    An easy-to-use anti-spam email gateway

    • Designed for Linux and Windows email system administrators, Scrollout F1 is an easy to use, already adjusted email firewall (gateway) offering free anti-spam and anti-virus protection aiming to secure existing email servers, old or new, such as Microsoft Exchange, Lotus Domino, Postfix, Exim, Sendmail, Qmail and others. • Built-in multilayer security levels make configuration effort equal to a car radio. • It combines simplicity with effective protection using powerful open source with additional set of rules & filters. • Available as 64bit: - ISO image (Internet connection required during installation) - install from scratch (Internet connection required during installation). • Minimum Requirements (for 5,000 messages/day): 1 GB of RAM 30 GB storage drive 1 Processor x86/AMD64 1 Ethernet x 1 IPv4 address UDP ports: 53 123 4500 6277 24441 TCP ports: 25 80 443 2703
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    Downloads: 100,873 This Week
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  • 2
    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: 2,664 This Week
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  • 3
    pdfcrack is a command line, password recovery tool for PDF-files.
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    Downloads: 549 This Week
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  • 4
    ettercap
    Ettercap is a multipurpose sniffer/interceptor/logger for switched LAN. It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis. Development has been moved to GitHub, https://github.com/Ettercap/ettercap
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    Downloads: 284 This Week
    Last Update:
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  • 5
    FreeArc combines best 7-zip and RAR features: auto-selected LZMA/PPMD/Multimedia compression, 1gb dictionary, exe/dict/delta data filters, updatable solid archives, SFXes, recovery record, AES+Twofish+Serpent encryption, Linux support and much more...
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    Downloads: 404 This Week
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  • 6
    Parrot Project

    Parrot Project

    Security, Development and Privacy Defense, all in one place.

    Parrot is a cloud friendly operating system designed for Pentesting, Computer Forensic, Reverse engineering, Hacking, Cloud pentesting, privacy/anonimity and cryptography. Based on Debian and developed by Frozenbox network.
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    Downloads: 181 This Week
    Last Update:
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  • 7
    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: 211 This Week
    Last Update:
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  • 8
    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: 64 This Week
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  • 9
    Xiaopan OS

    Xiaopan OS

    Easy to use pentesting distribution for wireless security enthusiasts

    Xiaopan OS is an easy to use software package for beginners and experts that includes a number of advanced hacking tools to penetrate WPA / WPA2 / WPS / WEP wireless networks. Based on the Tiny Core Linux (TCL) operating system (OS), it has a slick graphical user interface (GUI) requiring no need for typing Linux commands. Xiaopan OS is Windows, Mac and Linux compatible and users can simply install and boot this ~70mb OS through a USB pen drive or in a virtual machine (VM) environment. Some of the tools included are Inflator, Aircrack-ng, Minidwep GTK, XFE, wifite and feeding bottle. Supported cards include RTL8187L, RT3070, AR9271 and many more.
    Downloads: 71 This Week
    Last Update:
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  • 10
    FileVerifier++
    FileVerifier++ is a Windows utility for calculating hashes using a number of algorithms including CRC32, MD5, SHA-1, SHA-256/224/384/512, WHIRLPOOL, and RIPEMD-128/160/256/320. Supported hash file formats include MD5SUM .MD5, SFV, BSD CKSUM, and others.
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    Downloads: 57 This Week
    Last Update:
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  • 11
    DracOS GNU/Linux Remastered
    What is DracOS GNU/Linux Remastered ? DracOS GNU/Linux Remastered ( https://github.com/dracos-linux ) is the Linux operating system from Indonesia , open source is built based on Debian live project under the protection of the GNU General Public License v3.0. This operating system is one variant of Linux distributions, which is used to perform security testing (penetration testing). Dracos linux in Arm by hundreds hydraulic pentest, forensics and reverse engineering. Use a GUI-based tools-tools the software using the CLI (command line interface) and GUI (graphical user interface) to perform its operations. Now Dracos currently already up to version 3.1.5 with the code name "KUNTILANAK WITH REMASTERED".
    Downloads: 62 This Week
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  • 12
    WPSCrackGUI

    WPSCrackGUI

    Interfaz gráfica para el crackeo de redes WPS con Reaver.

    WPSCrackGUI es una interfaz gráfica para el crackeo de redes wireless con WPS.
    Downloads: 36 This Week
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  • 13

    buck-security

    Collection of security checks for Linux

    Buck-Security is a security scanner for Debian and Ubuntu Linux. It runs a couple of important checks and helps you to harden your Linux system. This enables you to quickly overview the security status of your Linux system. As a system administrator you often get into situations where you have to take care of a server, that has been maintained by other people before. In this situation it is useful to get an idea of the security status of the system immediately. Buck Security was designed exactly for this. It runs a few important checks and returns the results. It was designed to be extremely easy to install, use and configure.
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    Downloads: 28 This Week
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  • 14
    qingy is a replacement of getty. Written in C, it uses DirectFB to provide a fast, nice GUI without the overhead of the X Window System. It allows the user to log in and start the session of his choice (text console, gnome, kde, wmaker, ...).
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    Downloads: 27 This Week
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  • 15
    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: 27 This Week
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  • 16
    The objective of the TPM Emulator project is the implementation of a software-based TPM and MTM emulator as well as of an appropriate TCG Device Driver Library (TDDL).
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    Downloads: 47 This Week
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  • 17
    Coyote Linux

    Coyote Linux

    Network Security Appliance Linux Distribution

    Coyote Linux is a security-centric distribution of Linux designed to provide firewall, VPN, IP routing, and various other functions.
    Downloads: 18 This Week
    Last Update:
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  • 18
    BerserkArch

    BerserkArch

    A bleeding-edge, security-centric Arch-based Linux distribution.

    BerserkArch is a security-focused, performance-tuned Linux operating system (OS) based on Arch Linux, designed for developers, hackers, and technical users. A bleeding-edge, security-centric Arch-based Linux distribution crafted for hackers, developers, and nerds alike. Following the Arch Linux philosophy, it is designed to be highly customizable, allowing users to build their environment with only the components they need, rather than having a lot of pre-installed software like some other security distributions (e.g., Kali Linux). As an Arch-based distribution, it benefits from the rolling release model, providing users with the latest software versions and kernel updates. BerserkArch is a dist "designed to make you powerful" for specific use cases like reverse-engineering binaries and automating exploits, rather than being an easy-to-use distribution for general beginners.
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    Downloads: 32 This Week
    Last Update:
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  • 19
    SoupToNuts is a repository of technical articles and example software covering Postfix, OpenSSH, C and C++, Live Linux CD, MySQL, SQLite, Berkeley DB, Bash and System Administration.
    Downloads: 31 This Week
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  • 20
    Bypass is an IP forwarding/tunneling tool which can be used where limited bypassing of a firewall is necessary, but relaxing the restrictions in the actual firewall is not an option. The aim is for bypass to be automatic and transparent.
    Downloads: 28 This Week
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  • 21
    SafeBox

    SafeBox

    The Best file security app.

    A free and Open-Source File Encryption and Decryption app with GUI (Graphical User Interface) and CLI (Command Line Interface) that help you to protect your privacy well using AES (Advanced Encryption System) with your own password and get a single (portable )encrypted file that can share across internet or unsafe places with peace of mind without any data collection or any extra/hidden processes, It also can keep and encrypt the original file name within the file then while decryption (if you ticked the option) it can recover the original file name. I tried hard to help you in your privacy protection and keep this project running and developing. Good Luck :)
    Downloads: 20 This Week
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  • 22
    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: 10 This Week
    Last Update:
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  • 23
    Nast is a packet sniffer and a LAN analyzer. It sniff packets and save data in files, checks NIC in promisc mode,build LAN hosts list, find a gw,performs a port scanning, catchs daemon banner etc... It also provides a GTK/ncurses interface.
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    Downloads: 15 This Week
    Last Update:
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  • 24
    Getwifi allows Linux users to join wireless networks easily by joining available networks in an order specified by the user. Getwifi is configured using a single file which specifies networks, optional WEP keys, and the order in which to join networks.
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    Downloads: 14 This Week
    Last Update:
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  • 25
    Cyberoam iView - Open Source SIEM
    Cyberoam iView; the Intelligent Logging & Reporting solution provides organizations network visibility across multiple devices to achieve higher levels of security, data confidentiality while meeting the requirements of regulatory compliance. To know more about Cyberoam and it’s security solutions visit us at www.cyberoam.com.
    Downloads: 2 This Week
    Last Update:
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