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

  • 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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  • Nonprofit Budgeting Software Icon
    Nonprofit Budgeting Software

    Martus Solutions provides seamless budgeting, reporting, and forecasting tools that integrate with accounting systems for real-time financial insights

    Martus' collaborative and easy-to-use budgeting and reporting platform will save you hundreds of hours each year. It's designed to make the entire budgeting process easier and create unlimited financial transparency.
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  • 1
    waircut

    waircut

    WPS wireless protocol audit software for Windows

    Wireless Air Cut is a WPS wireless, portable and free network audit software for Ms Windows. It is used to check the security of our wps wireless networks and to detect possible security breaches. You can check if the router has a generic and known wps pin set, if it is vulnerable to a brute-force attack or is vulnerable to a Pixie-Dust attack. You can see the Installation instructions on Wiki. ------- Wireless Air Cut es un software de auditoria del protocolo WPS en redes wireless, portable, libre y gratuito para Ms Windows. Sirve para comprobar la seguridad WPS de nuestras redes wireless y detectar posibles brechas de seguridad. Puede comprobar si el router tiene establecido un pin wps genérico y conocido, si es vulnerable a un ataque por fuerza bruta o si es vulnerable a un ataque Pixie-Dust. Ver Instrucciones de instalación en la wiki.
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    Downloads: 3,601 This Week
    Last Update:
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  • 2
    VeraCrypt

    VeraCrypt

    Open source disk encryption with strong security for the Paranoid

    VeraCrypt is a free disk encryption software brought to you by IDRIX (https://www.idrix.fr) and based on TrueCrypt 7.1a. It adds enhanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. It also solves many vulnerabilities and security issues found in TrueCrypt. This enhanced security adds some delay ONLY to the opening of encrypted partitions without any performance impact to the application use phase. This is acceptable to the legitimate owner but it makes it much harder for an attacker to gain access to the encrypted data. All released files are PGP signed with key ID=0x680D16DE, available on key servers and downloadable at https://www.idrix.fr/VeraCrypt/VeraCrypt_PGP_public_key.asc VeraCrypt can mount TrueCrypt volumes. It also can convert them to VeraCrypt format. Documentation: https://www.veracrypt.fr/en/Documentation.html FAQ : https://www.veracrypt.fr/en/FAQ.html
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    Downloads: 2,310 This Week
    Last Update:
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  • 3
    ngrep strives to provide most of GNU grep's common features,applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular expressions to match against data payloads of packets. SUPPORT/REPORTING BUGS: please use https://github.com/jpr5/ngrep/issues Thank you!
    Downloads: 16 This Week
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  • 4
    PVPLE
    VPLE (Linux) Vulnerable Pentesting Lab Environment VPLE is an Intentionally Vulnerable Linux Virtual Machine. This VM can be used to conduct security training, test security tools, and practice common penetration testing Labs. In VPLE bunch of labs are Available. NOTE:- "Only run in VMWare Pls Don’t run in VirtualBox" Will also run on the ProxMox server to understand how to do it pls refer to the doc in the zip named "Cybersecurity Lab Deployment on Proxmox" The default login and password is administrator: password. List Of All Labs in one VM:- 1. Web-DVWA 2. Mutillidae 3. Webgoat 4. Bwapp 5. Juice-shop 6. Security-ninjas 7. WordPress We are adding more labs in few days
    Downloads: 18 This Week
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  • Build Powerful Custom Apps—Without Code Icon
    Build Powerful Custom Apps—Without Code

    Create custom applications tailored to your specific needs.

    GW Apps empowers your team to create tailored business applications in days, not months. Streamline operations, automate workflows, and manage data more effectively—all without writing a single line of code.
    Learn More
  • 5
    USBRescueX

    USBRescueX

    Rescue and clean your hard disk or USB memory, delete broken shortcuts

    USBRescuex in its version 2.1 is a computer program category in utility software for files and folders, which its main function is the recovery of hidden files, read-only and corrupted our device (either USB memory devices, removable storage or hard disk). Besides recover those important files for you , eliminates the famous RECYCLER virus , which is the basis of other USB flash drives for viruses , this virus is the main wrongdoer in your USB/Storage Device/Device Storage space Removable memory/disk hard, as the virus will hide all your files and folders , creating false shortcuts and reproducing more viruses to your computer and other USB/removable Devices/Hard Drives storage. The USBRescueX is a lightweight program easy to use and takes up very little space in your computer memory , and is portable version, optimized to run on any windows operating system than Windows XP or higher .
    Downloads: 12 This Week
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  • 6
    wolfSSL
    The wolfSSL embedded SSL library (formerly CyaSSL) is a lightweight, portable, C-language-based SSL/TLS library targeted at IoT, embedded, and RTOS environments primarily because of its size, speed, and feature set. It works seamlessly in desktop, enterprise, and cloud environments as well. wolfSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2, is up to 20 times smaller than OpenSSL, offers a simple API, an OpenSSL compatibility layer, OCSP and CRL support, is backed by the robust wolfCrypt cryptography library, and much more. wolfSSL relies on the FIPS 140-2 validated wolfCrypt library for all cryptographic functionality. Visit http://wolfssl.com/wolfSSL/fips.html for more info!
    Downloads: 11 This Week
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  • 7
    Expand a TrueCrypt volume on the fly without reformatting. All kind of volumes (container files, disks and partitions) formatted with the NTFS file system are supported.
    Downloads: 2 This Week
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  • 8
    Bootable CD Forensics/Virus Scanning/Recovery/PenTesting platform
    Downloads: 4 This Week
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  • 9
    Leo Folder Locker

    Leo Folder Locker

    Freeware folder locking utility to lock your important data.

    Leo Folder Locker is a free/freeware folder locking software specially designed for those who want to secure there important data in just a simple folder.This folder locker software creates a secure folder user puts its important stuff in it and then that folder is locked down so that no one can access your data.It is a easy to use CLI based software. Note :: Please make sure that you have unlocked all locked folders before reinstalling Windows or else you might face data loss.
    Downloads: 4 This Week
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  • High-performance Open Source API Gateway Icon
    High-performance Open Source API Gateway

    KrakenD is a stateless, distributed, high-performance API Gateway that helps you effortlessly adopt microservices

    KrakenD is a high-performance API Gateway optimized for resource efficiency, capable of managing 70,000 requests per second on a single instance. The stateless architecture allows for straightforward, linear scalability, eliminating the need for complex coordination or database maintenance.
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  • 10
    eEye Retina Community

    eEye Retina Community

    Powered by the same engine as the world famous Retina Network Scanner

    Powered by the same engine as the Retina Network Security Scanner, Retina Community is a completely free security scanner for up to 128 IPs. Use it to scan servers, desktops - any networked device - for security flaws, and learn how to fix them. New: Now, you can scan virtual applications, deployed via VMware ThinApp, for flaws as well. This is a new industry development, completely unique to eEye.
    Downloads: 3 This Week
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  • 11
    LOIC

    LOIC

    LOIC TCP/IP Stresser v1.1.0.1 By LifeOwner

    LOIC TCP/IP Stresser Tool History I was downloaded the original LOIC within version 1.0.8.0 and changed it to be better without changing the other functions which were worked nice. The grey skin i hope you like it! Reworked by LifeOwner. New Features Work • The UDPV2 work like charm with low builded connections you might get timeout in your internet connection might cause you're too slow. (I tested it with 25MB's Downstream/ 2MB's Upstream). • The status checker function will be slowly when the ip->port will be offline, so do not worry the program still running and working on it, just the timeout is bigger than usually to make sure it will works for slower connections. Have fun with it i hope you will like it! New build by LifeOwner 2016.
    Downloads: 2 This Week
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  • 12
    A configurable system for synchronising multiple passwords of different types. Password quality can be imposed by using histories, cracklib based tests, and forcing certain passwords to be distinct. CGI and PAM modules exist for tight integration.
    Downloads: 2 This Week
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  • 13
    OpenVPN GUI Login-Tool

    OpenVPN GUI Login-Tool

    Enters user+pass for you + allows scheduled IP change for OpenVPN GUI

    The OpenVPN client ( https://sourceforge.net/projects/openvpn-gui ) is the standard VPN client for OpenVPN protocol on Windows. Unfortunately you have to enter your username+password each time you're connecting. Since the client does not offer a way to save the users login details, you can now use this OpenVPN GUI Login-Tool. Enter your username and password, save it. Then, as long as the app is running, you don't need to enter your login details ever again. Useful! (don't worry, the login details get saved encrypted and secure) The latest version has this new features: - a scheduled IP change every X seconds/minutes - a manual reconnect with 1 click. - option to run the app with parameters "login" or "reconnect", e.g. to use it in scripts or ext. apps This tool has been made for HideMyAss Pro VPN -> http://www.hidemyass.com If you have any suggestions, questions or if you experience any issues or errors, please contact me @ info@hmastuff.com or post in the discussion page
    Downloads: 1 This Week
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  • 14
    PCNetMonitor

    PCNetMonitor

    Computer performance display and logging program

    Local and remote computer performance display and logging program with Excel plotting interface and many other powerful features.
    Downloads: 1 This Week
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  • 15

    AmsBuild

    A collection of portable apps.

    All Software build by YouvirajNikesh, available here. Click on Browse All Files then In my apps folder: 1. PassKeepV0.1 Other Folders are: 1. AmsPlugins Action (74 Plug-ins) 2. AmsPlugins Object (empty folder)
    Downloads: 0 This Week
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  • 16
    Automated Security Tools (autosec) aims to provide automatic tools which network administrators may use to help check and test the security of their network.
    Downloads: 0 This Week
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  • 17
    Banshell is a tool to scriptably execute commands on a remote machine. It was designed with the goal of increasing security by only allowing a specified set of commands to be executed.
    Downloads: 0 This Week
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  • 18
    This is an attempt to port the CIS Benchmark tool (http://cisecurity.org/index.html) to OS X from its Linux implementation. This project is working on taking the source from the Level 1 Linux implementation, written in Perl, and porting it to OS X. The
    Downloads: 0 This Week
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  • 19
    Downloads: 0 This Week
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  • 20
    Derived from TrueCrypt 6.3 release, I added some command line options to "TrueCrypt Format.exe" to allow TrueCrypt volumes to be created without using the graphical user interface
    Downloads: 0 This Week
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  • 21
    This program is meant to cleanup your computer system of unwanted adaware and temporary internet files. Optionally you can also clear cookies and history.
    Downloads: 0 This Week
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  • 22
    Engrane3D is a fully working LiveCD OS powered by Slackware/Slax with a personalized set of tools to set, configure clusters, tools for hosting serving, a built-in parallel 3D renderer and a nice set of compilers and libs (SDL,MPI, Mesa).
    Downloads: 0 This Week
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  • 23
    Free Agents DIDS is a distributed intrusion detection system that you place on each host on your network. Agents intercommunicate with aes encryption, automatically alert you, and secure your network for free!
    Downloads: 0 This Week
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  • 24
    GNet Server - Network compression client/server software. Compresses data over slow networks to save on the cost of bandwidth. Server is developed for Unix and Windows platforms, The client will run on Windows based PCs.
    Downloads: 0 This Week
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  • 25
    IPRARU

    IPRARU

    Computer security tool for the information gathering stage

    Computer security tool for the information gathering stage, obtaining the IP address through redirection and social engineering.
    Downloads: 0 This Week
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