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

  • All-in-One IT Monitoring - No More Blind Spots Icon
    All-in-One IT Monitoring - No More Blind Spots

    Stop juggling tools. PRTG gives you a complete, real-time view of your IT: servers, devices, cloud, and more - in one easy dashboard.

    Tired of switching between different tools and missing critical alerts? PRTG brings everything together, monitoring your entire IT infrastructure from a single, intuitive interface. Whether it’s servers, switches, printers, or cloud services, you get instant visibility and clear notifications - no technical jargon, no clutter. Set up in minutes, PRTG helps you prevent downtime, reduce stress, and prove your value to your company. Focus on your job, not on chasing issues. Try PRTG and experience true IT peace of mind.
    Get Your Unified IT Trial
  • Comet Backup - Fast, Secure Backup Software for MSPs Icon
    Comet Backup - Fast, Secure Backup Software for MSPs

    Fast, Secure Backup Software for Businesses and IT Providers

    Comet is a flexible backup platform, giving you total control over your backup environment and storage destinations.
    Learn More
  • 1
    JSch is a pure Java implementation of SSH2. JSch allows you to connect to an sshd server and use port forwarding, X11 forwarding, file transfer, etc., and you can integrate its functionality into your own Java programs.
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    Downloads: 903 This Week
    Last Update:
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  • 2
    OWASP Mantra - Security Framework

    OWASP Mantra - Security Framework

    Free and Open Source Browser based Security Framework

    OWASP Mantra - Free and Open Source Browser based Security Framework, is a collection of free and open source tools integrated into a web browser, which can become handy for penetration testers, web application developers, security professionals etc.
    Downloads: 44 This Week
    Last Update:
    See Project
  • 3
    RetroShare

    RetroShare

    [WARNING] Project has moved to http://github.com/Retroshare/Retroshare

    [IMPORTANT] Retroshare is now distributed on Github. Please go to http://retroshare.net to find the latest releases and sources. RetroShare is a cross-platform, secured and decentralized communication system. It lets you to securely chat, share photos, videos, and more with family and friends, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.
    Downloads: 31 This Week
    Last Update:
    See Project
  • 4

    KPSourceForgeUpdateChecker

    A plugin to allow other plugins to check for updates on SourceForge

    This is a plugin to KeePass <http://www.KeePass.info> to allow other plugins to check for updates using the latest file release on SourceForge. On it's own, it does nothing, but other plugins may require this one in order to provide version information when KeePass checks for upades
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    Downloads: 20 This Week
    Last Update:
    See Project
  • The only CRM built for B2C Icon
    The only CRM built for B2C

    Stop chasing transactions. Klaviyo turns customers into diehard fans—obsessed with your products, devoted to your brand, fueling your growth.

    Klaviyo unifies your customer profiles by capturing every event, and then lets you orchestrate your email marketing, SMS marketing, push notifications, WhatsApp, and RCS campaigns in one place. Klaviyo AI helps you build audiences, write copy, and optimize — so you can always send the right message at the right time, automatically. With real-time attribution and insights, you'll be able to make smarter, faster decisions that drive ROI.
    Learn More
  • 5
    The Freenet Project
    Development of a Java application designed to allow the free flow of information and ideas on the Internet without fear of censorship of any kind.
    Downloads: 15 This Week
    Last Update:
    See Project
  • 6
    WEPCrack is a tool that cracks 802.11 WEP encryption keys using the latest discovered weakness of RC4 key scheduling.
    Downloads: 23 This Week
    Last Update:
    See Project
  • 7
    A client-server multithreaded application for bruteforce cracking passwords. The more clients connected, the faster the cracking. Plugin-based. Supports only RAR passwords at the moment and only with encrypted filenames.
    Downloads: 49 This Week
    Last Update:
    See Project
  • 8
    phpLDAPadmin
    phpLDAPadmin is a web-based LDAP administration tool for managing your LDAP server. With it you can browse your LDAP tree, view LDAP schema, perform searches, create, delete, copy and edit LDAP entries. You can even copy entries between servers.
    Downloads: 22 This Week
    Last Update:
    See Project
  • 9
    PDFCrack - GUI
    PDF Crack GUI is an open-source GUI overlay for the popular and highly regarded 'pdfcrack' (http://sourceforge.net/projects/pdfcrack/) by Henning Noren. THIS PAGE IS FOR THE OLDER VERSIONS ONLY. SINCE MAY 2020, PROJECT CAN NOW BE FOUND AT : https://quickhash-gui.org/download/pdfcrack-gui/
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    Downloads: 20 This Week
    Last Update:
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  • Find out just how much your login box can do for your customer | Auth0 Icon
    Find out just how much your login box can do for your customer | Auth0

    With over 53 social login options, you can fast-track the signup and login experience for users.

    From improving customer experience through seamless sign-on to making MFA as easy as a click of a button – your login box must find the right balance between user convenience, privacy and security.
    Sign up
  • 10
    Aircrack-ng Windows GUI
    This is mainly just an interface tweak. Added function of mac address changer. If you have problems getting the mac changer to work, try using a mac address that starts with something other than "00" in the first octet. If you are intersted in learning about network security please check out my Juniper Networks training course at: http://academy.gns3.com/courses/juniper-jncia-intro-to-junos
    Downloads: 5 This Week
    Last Update:
    See Project
  • 11
    Razorback
    Project Razorback(tm). A framework for detection.
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    Downloads: 10 This Week
    Last Update:
    See Project
  • 12
    This project will serve as a central hosting/bug tracking center for modifications to the SmoothWall.org firewall distribution. Support and information for the "mods" posted here can be found on the SmoothWall.org forums, the SmoothWall.org IRC server, or
    Downloads: 10 This Week
    Last Update:
    See Project
  • 13
    APDUscanner is a small program to explore ISO-7816 smart cards. It scans for undocumented command APDUs, discovers files (EF/DF), and allows manual command/response debugging. Also reads payment data from ChipKnip (Dutch). Requires PC/SC card reader.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 14
    OpenSignature is an open source project for the digital signature of documents. It works with all cards supported by OpenSC and focuses on adding support for cards from accredited Italian CAs. The goal of the project is to provide a first single product
    Downloads: 9 This Week
    Last Update:
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  • 15
    Accepts machine specific, time sensitive password from standard user to then allow the user to run a new application as local Administrator. Released under GPL.
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    Downloads: 8 This Week
    Last Update:
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  • 16
    This project aims at full implementation of RFC4306 and associated RFCs. It is implemented as daemon process, as is custom for this type of software for Unix-like operating systems. Main target for daemon is Linux environment, specifically Fedora Core 5.
    Downloads: 12 This Week
    Last Update:
    See Project
  • 17
    KlamAV is an Anti-Virus Manager for the KDE Desktop. Based on the ClamAV scanning engine, it features : 'On Access' Scanning * Manual Scanning * Quarantine Management * Update Management * Mail Scanning (KMail/Evolution) * Virus Browser
    Downloads: 12 This Week
    Last Update:
    See Project
  • 18
    WinBOLT

    WinBOLT

    Maintenance Automation Utility

    This tool is created by a Technician for the Technicians. This will simplify your job on the Windows Operating System. Working with these systems, more often than not tasks like maintenance become perpetual. With that in mind, my ultimate goal and function of WinBOLT were simple, fool proof secure automation. WinBOLT automates the standard process of annoying Windows Updates, Malware Scans, running CCleaner etc. This tool is simple, effective and powerful. Check out our website! http://WinBOLT.net/ Developed by Christian Vazquez https://Linkedin.com/in/TechnicianOnline
    Downloads: 4 This Week
    Last Update:
    See Project
  • 19
    MalbianLinux

    MalbianLinux

    GNU/Linux Distribution for Malware Analysis and Reverse Engineering.

    Malbian is a Light-weight Debian Based GNU/Linux Distribution for Malware Analysis and Reverse Engineering designed to aid the user in both Static and Dynamic analysis of malware samples. 100% Free to use and distribute. About: https://github.com/MalbianLinux Installation Guide in: https://github.com/MalbianLinux/Malbian-ISOs/
    Downloads: 11 This Week
    Last Update:
    See Project
  • 20
    Aegis Implicit Mail (AIM)

    Aegis Implicit Mail (AIM)

    Send Mime and Smime Emails to Any Type of Mail Server

    Aegis Implicit Mail is a free and open source library which is designed to provide fast and developer friendly API to send emails using SMTP ports. Binaries are available in the form of NuGet package: https://www.nuget.org/packages/AIM Please check http://pki.tools/aim.html as well AIM Supports : * None Ssl Mails * Implicit Ssl Mails * Explicit Ssl Mails * Smtp Connection test * Detect Ssl type of mail server * Attachments for MIME and S/MIME message. * In-line attachment and separate file attachment * All content types and mimes * SMIME , Signed and Encrypted mails In an integrated way Sadly, Microsoft.Net.Mail Ssl Mails does not support Implicit Ssl Mail and it is still used by many servers, including port 465 of Gmail here AIM comes to make a readable and fast alternative to send your smtp mails. For unicode issues please refer to https://sourceforge.net/p/netimplicitssl/tickets/4/ . We really appriciate any help in testing of different encodings
    Downloads: 2 This Week
    Last Update:
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  • 21
    The Saint Jude Project is a Project to develop Kernel-Level IDS mechinisms to protect the integrity of host systems.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 22
    WASTE is a mesh-based workgroup tool that allows for encrypted, private communication between distant parties on the internet, independant of local network organization.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 23
    OpenFirewall (only for windows XP)
    Only for windows XP OpenFirewall is based on two lines of defence first WIPFW ( Kernel-mode driver ) and second tdifw ( application-mode TDI-driver ) . Is a Windows firewall easy to use like the commercial products
    Downloads: 8 This Week
    Last Update:
    See Project
  • 24
    Cross platform GUI managing bookmarks and shortcuts in a portable way. Support import/export, search, encryption, hierarchical tags, USB key installation, various environments integration, OS-dependent shortcuts, plugins extensibility.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 25
    A document that describes Public-Key Infrastructures, the PKIX standards, explains practical PKI functionality and gives an overview of available open-source PKI implementations. Its goal is to foster the creation of a hign quality open-source PKI.
    Downloads: 4 This Week
    Last Update:
    See Project
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