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

  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

    MongoDB Atlas provides built-in vector search and a flexible document model so developers can build, scale, and run gen AI apps without stitching together multiple databases. From LLM integration to semantic search, Atlas simplifies your AI architecture—and it’s free to get started.
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  • 1
    KeePass

    KeePass

    A lightweight and easy-to-use password manager

    KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.
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    Downloads: 199,610 This Week
    Last Update:
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  • 2
    Password Safe

    Password Safe

    Popular easy-to-use and secure password manager

    Password Safe is a password database utility. Users can keep their passwords securely encrypted on their computers. A single Safe Combination unlocks them all.
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    Downloads: 2,013 This Week
    Last Update:
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  • 3
    BleachBit

    BleachBit

    deletes junk files to free disk space and improve privacy

    BleachBit frees disk space and maintains privacy. Cleans cache, Internet history, temporary files, logs, cookies, Firefox, Google Chrome, Flash, Windows, Linux, and more. Downloads are at www.bleachbit.org and source code is at GitHub.
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    Downloads: 1,913 This Week
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  • 4
    JSignPdf
    JSignPdf is an open-source Java application that adds digital signatures to PDF documents.
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    Downloads: 703 This Week
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  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
    Try Retool free
  • 5
    AWStats

    AWStats

    AWStats Log Analyzer

    AWStats is a free powerful and featureful server logfile analyzer that shows you all your Web/Mail/FTP statistics including visits, unique visitors, pages, hits, rush hours, os, browsers, search engines, keywords, robots visits, broken links and more
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    Downloads: 345 This Week
    Last Update:
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  • 6
    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: 431 This Week
    Last Update:
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  • 7
    Robolinux

    Robolinux

    Announcing Robolinux Cinnamon 14.1

    Announcing The New Robolinux Series 14 Mate LTS - 2034 Robolinux is very pleased to announce a completely new 14.1 Mate privacy centered 1inux operating system you can download freely while also offering our users an optional 14+ advanced upgrade which comes with our Untracker and FAAST Boot along with one click popular privacy software installers like Tor and I2p, Wireshark and Bleachbit plus many more for a fair and reasonable price. Robolinux14.1-Mate is ideal for beginners and advanced users. We are proud that it comes with Enoch AI which is TOTALLY 100% PRIVATE, FREE, HONEST & UNCENSORED built into Robolinux Cinnamon 14.1 The Robolinux 14.1 version with rock solid Long Term Support through 2034! requires users to set secure boot in their BIOS. It is currently available in the Cinnamon desktop flavor. we will release series 14 Xfce version in the next two months.For more information please see Readme file. Warmest regards John Martinson Robolinux.org
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    Downloads: 90 This Week
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  • 8
    PortableSigner
    PortableSigner is a tool for digital signing (with X.509 certificates) of PDF files
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    Downloads: 15 This Week
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  • 9
    BASE is the Basic Analysis and Security Engine. It is based on the code from the Analysis Console for Intrusion Databases (ACID) project. This application provides a web front-end to query and analyze the alerts coming from a SNORT IDS system.
    Downloads: 6 This Week
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  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 10
    QPass password manager
    QPass is easy to use, open source password manager application with built-in password generator. You can store in it's database such data as passwords and logins which will be encrypted using AES-256 with PBKDF2(number of iterations set by user). Each entry can include additional information about entry such as name, url adress and description.
    Downloads: 6 This Week
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  • 11
    garysfm

    garysfm

    An advanced file manager with qss themes and iso and folder previews

    garysfm which stands for Gary's File Manager is a file manager with some advanced features. Those features include bulk renaming and folder image previews. I has rather advanced search functions, tab browsing with persistence between launches. It remembers your folder sorting and view options in icon view. It also remembers your active tabs between sessions. It has progress dialog while doing large operations like copying large files, and folders with many files. python version works on mac 11.0.1 or above and on Linux. The exe definitely works on Windows 11 and 10 amd and intel 64 bit systems. the exe is not for arm systems. Full theming engine with qss support for advanced theming in 1.2.4 To use themes other than the default download gsfmt.zip, and qss.zip and extract them to the directory where your garysfm is located. (version 1.2.3 and above for gsfmt and 1.2.4 and above for qss.) 1.2.9 has cloud syncing, bookmarks, tags, and collections, and cleaner
    Downloads: 17 This Week
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  • 12
    Kali Linux Polish Edition

    Kali Linux Polish Edition

    Polish version of Kali LINUX

    Polish version of Kali LINUX pentesting linux distro
    Downloads: 2 This Week
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  • 13
    LazLock

    LazLock

    Free, cross platform, portable password manager.

    The latest version of LazLock is at https://github.com/cyberfilth/LazLock/releases A free, lightweight, portable password manager for Windows & GNU/Linux that encrypts your data with 128 bit AES encryption. LazLock also includes a password generator which allows you to create more secure passwords. A plain text version of your data is never written to disk as all decryption is done in memory. LazLock is truly portable, no installation is required so it can be run from a USB drive. Unlike similar programs, there are no dependencies on the .NET Framework (Windows) or Mono (Linux) ------------------------------------- Easily Copy and Paste your login details into any website without having to manually type them out. Your passwords aren't shown on screen so you can use LazLock in front of others without compromising your security. Generate more secure passwords for the websites that you visit, you only need to remember one password to unlock them all.
    Downloads: 3 This Week
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  • 14
    Passky Desktop Application

    Passky Desktop Application

    Simple, modern, lightweight and open-source password manager

    Passky is a free and open source password manager that is both powerful and easy to use. It is available in multiple languages as an application for Windows, macOS, Linux and Android, but also as an extension for Chrome, Firefox, Edge and Opera web browsers. This password manager helps you keep all your passwords safe : e-commerce sites, applications, social networks, games, etc. With Passky, you can create, manage and store up to 1000 passwords for free in a secure and encrypted way. Besides, Passky has a built-in random password generator to create strong passwords. It also has a well-designed user interface that makes managing your passwords easy. What’s more, you even have the choice of the theme of the application: Dark, Solarized Dark, Tokyo Night, Dracula, Monokai, Blue, Nord, Gray and Light... Finally, note that if you are currently using another password manager, you have the option to import your passwords from all major password managers.
    Downloads: 5 This Week
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  • 15
    Stealth VM For Ubuntu & All Derivatives

    Stealth VM For Ubuntu & All Derivatives

    Run Windows XP & 7 Virus Free Inside Ubuntu & All Derivatives

    Announcing Stealth VM Software for Ubuntu & Derivatives! http://robolinux.org/ubuntu This is great news for Windows XP Users who either cannot afford or simply do not want to upgrade to Windows 7 or 8 when XP expires! Are You one of the many new Ubuntu Users around the world who are migrating from Windows XP to Linux because you don't want to to be forced to spend hundreds of dollars or throw away your PC or laptop that is in perfectly good working condition? If you are like most Windows XP Users who are just switching to Linux you are worried about being able to run your Windows applications. Indeed that is a problem you are looking to solve as quickly as possible. Stealth VM Software has solved your Windows to Linux migration dilemma already! You don't need to worry about viruses or malware infecting Windows & its data because Stealth VM Software invented by Robolinux keeps a protected clone of Windows and mirrors your data in a secure Ubuntu Linux partition.
    Downloads: 2 This Week
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  • 16
    Swf Reader

    Swf Reader

    Adobe Flash SWF file reader, editor

    Adobe Flash SWF editor which can read and edit bytecode.
    Downloads: 1 This Week
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  • 17
    KeexyBox

    KeexyBox

    The box to keep the Internet under your control

    KeexyBox allows you to do parental control, block ads, limit telemetry, and browse the Internet anonymously from your home network without installing any software on your devices. It also can be used to create a public wireless access point with the captive portal. It is a software program which requires a Raspberry PI box and which is installed on Raspbian. It constitutes a cut-off point between your devices (computers, tablets, smartphones, etc.) and your router or Internet box. KeexyBox acts as a default gateway and DNS server for the devices in your home network. It thus intercepts all connections to the Internet to carry out website filtering or to activate browsing via the Tor anonymity network according to connection profiles which you have configured.
    Downloads: 1 This Week
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  • 18
    Password Manager is a program which can be used to keep passwords and important data in a safe place.
    Downloads: 1 This Week
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  • 19
    PasswordMaker - One Password To Rule Them All!
    Downloads: 1 This Week
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  • 20
    QR-CERT. Free PKI Certificate Authority

    QR-CERT. Free PKI Certificate Authority

    PKI & Card Management System to issue and manage tokens & certificates

    The QR-CERT software is a specialized package of applications dedicated for the development of a Public Key Infrastructure system as well as the cards personalization and management system. The software contains a number of functional modules, enabling a flexible selection of functionalities for implementation. The software is dedicated for large organizations and corporate environments, with a PKI infrastructure and microprocessor cards. The QR-CERT is a solution both for the companies which plan to build their own PKI infrastructure and entities planning to provide services in this respect. This software enables the implementation of advanced security mechanisms, such as: secure e-mail (S/MIME), electronic signature (PKCS#7, XAdES), network transmission protection (IPSEC, SSL/TLS) and strong authentication for service portals (HTTPS) or strong authentication of users for the Windows ActiveDirectory domain.
    Downloads: 1 This Week
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  • 21
    keytabGUI
    GUI for Kerberos Keytab files. Associate it with *.keytab extension to view them. JNLP installer page: http://keytabgui.sourceforge.net
    Downloads: 1 This Week
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  • 22
    AresCode2008 is system to crypt files. System is used new cryptography algorithm.
    Downloads: 0 This Week
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  • 23
    FOAFRealm (also called D-FOAF in version 2.0) is a distributed user profile management system based on FOAF. FOAFRealm is a set of tools that enables to manipulate FOAF (Friend-of-a-Friend) information within J2EE application and provides Realm implement
    Downloads: 0 This Week
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  • 24
    GTCop Professional Security Appliance aims to provide a powerful tool for satellite communications, with enhanced QoS and bandwidth controls. As derived from IPCop Firewall, it is a stable, secure, easy to configure and maintain GNU/Linux firewall box.
    Downloads: 0 This Week
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  • 25
    Kippo-Graph

    Kippo-Graph

    Full featured script to visualize statistics from a Kippo SSH honeypot

    Kippo-Graph is a full featured script to visualize statistics from a Kippo SSH honeypot. It uses “Libchart” PHP chart drawing library by Jean-Marc Trémeaux, “QGoogleVisualizationAPI” PHP Wrapper for Google’s Visualization API by Thomas Schäfer and geoPlugin geolocation technology (geoplugin.com). Kippo-Graph currently shows 24 charts, including top 10 passwords, top 10 usernames, top 10 username/password combos, success ratio, connections per IP, connections per country, probes per day, probes per week, ssh clients, top 10 overall input, top 10 successful input, top 10 failed input and many more. There are also geolocation data extracted and displayed with Google visualization technology using a Google Map, a Intensity Map, etc. Lastly, input-related data and statistics are also presented giving an overview of the action inside the system and there is live playback ability of captured sessions.
    Downloads: 0 This Week
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