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

  • Red Hat Enterprise Linux on Microsoft Azure Icon
    Red Hat Enterprise Linux on Microsoft Azure

    Deploy Red Hat Enterprise Linux on Microsoft Azure for a secure, reliable, and scalable cloud environment, fully integrated with Microsoft services.

    Red Hat Enterprise Linux (RHEL) on Microsoft Azure provides a secure, reliable, and flexible foundation for your cloud infrastructure. Red Hat Enterprise Linux on Microsoft Azure is ideal for enterprises seeking to enhance their cloud environment with seamless integration, consistent performance, and comprehensive support.
  • Top-Rated Free CRM Software Icon
    Top-Rated Free CRM Software

    216,000+ customers in over 135 countries grow their businesses with HubSpot

    HubSpot is an AI-powered customer platform with all the software, integrations, and resources you need to connect your marketing, sales, and customer service. HubSpot's connected platform enables you to grow your business faster by focusing on what matters most: your customers.
  • 1
    XAMPP

    XAMPP

    An easy to install Apache distribution containing MySQL, PHP, and Perl

    XAMPP is a very easy to install Apache Distribution for Linux, Solaris, Windows, and Mac OS X. The package includes the Apache web server, MySQL, PHP, Perl, a FTP server and phpMyAdmin.
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    Downloads: 444,486 This Week
    Last Update:
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  • 2
    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: 153,748 This Week
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  • 3
    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server implements multiple spam filters

    The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.
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    Downloads: 52,897 This Week
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  • 4
    Zero Install
    Zero Install is a decentralised cross-distribution software installation system. Create one package that works everywhere! With dependency handling and automatic updates, full support for shared libraries, and integration with native package managers
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    Downloads: 44,759 This Week
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  • Employee monitoring software with screenshots Icon
    Employee monitoring software with screenshots

    Clear visibility and insights into how employees work. Even remotely.

    Stay productive working at any distance from anywhere with Monitask.
  • 5
    Tcl

    Tcl

    The Tool Command Language implementation

    Tool Command Language (Tcl) is an interpreted language and very portable interpreter for that language. Tcl is embeddable and extensible, and has been widely used since its creation in 1988 by John Ousterhout. Bug reports to http://core.tcl.tk/tcl/ Follow code development at http://core.tcl.tk/tcl/
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    Downloads: 37,507 This Week
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  • 6
    GeoServer
    GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. Designed for interoperability, it publishes data from any major spatial data source using open standards: WMS, WFS, WCS, WPS and REST
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    Downloads: 23,636 This Week
    Last Update:
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  • 7
    net-snmp
    Net-SNMP provides tools and libraries relating to the Simple Network Management Protocol including: An extensible agent, an SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, etc.
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    Downloads: 16,593 This Week
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  • 8
    Tor Browser

    Tor Browser

    Browser for using Tor on Windows, Mac OS X or Linux

    Tor Browser enables you to use Tor on Windows, Mac OS X, or Linux without needing to install any software. Tor is a software that bounces your communications around a distributed network of relays run by volunteers. This effectively prevents anyone watching your Internet connection from learning what sites you visit; it prevents the sites you visit from learning your physical location; and allows you access to sites which are blocked. Tor Browser can run off a USB flash drive, comes with a pre-configured web browser to protect your anonymity, and is self-contained (portable).
    Downloads: 2,143 This Week
    Last Update:
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  • 9
    Double Commander
    Double Commander is a cross platform open source file manager with two panels side by side. It is inspired by Total Commander and features some new ideas.
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    Downloads: 8,782 This Week
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  • Pimberly PIM - the leading enterprise Product Information Management platform. Icon
    Pimberly PIM - the leading enterprise Product Information Management platform.

    Pimberly enables businesses to create amazing online experiences with richer, differentiated product descriptions.

    Drive amazing product experiences with quality product data.
  • 10

    Expat XML Parser

    Fast XML parser library in C

    PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/libexpat/libexpat This is James Clark's Expat XML parser library in C. It is a stream oriented parser that requires setting handlers to deal with the structure that the parser discovers in the document. PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/libexpat/libexpat
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    Downloads: 8,512 This Week
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  • 11
    Ufficio Zero Linux OS

    Ufficio Zero Linux OS

    Linux Desktop OS for professionals

    Ufficio Zero Linux OS is a desktop operating system offered in many versions based on PCLinuxOS, Linux Mint and Devuan. We also have created Duplica, a Bare Metal Restore Solution. This distro has many packages for professional use. The project is managed by the Italian company SIITE SRLS. Ufficio Zero Linux OS is trademarked through the Linux Mark Institute. All rights reserved. Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries. website https://ufficiozero.org forum https://forum.ufficiozero.org wiki https://wiki.ufficiozero.org video tutorial https://odysee.com/$/invite/@ufficiozero:f YouTube Channel https://www.youtube.com/@UfficioZeroLinuxOS
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    Downloads: 7,406 This Week
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  • 12

    DNS2SOCKS

    DNS to SOCKS or HTTP proxy

    This is a command line utility to resolve DNS requests via a SOCKS tunnel like Tor or a HTTP proxy.
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    Downloads: 12,974 This Week
    Last Update:
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  • 13
    Termux:X11

    Termux:X11

    Termux X11 add-on application

    Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required. A minimal base system is installed automatically - additional packages are available using the APT package manager. Termux combines standard packages with accurate terminal emulation in a beautiful open-source solution. Access API endpoints with curl and use rsync to store backups of your contact list on a remote server.
    Downloads: 781 This Week
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  • 14
    Vuze - Azureus

    Vuze - Azureus

    An extremely powerful and configurable BitTorrent client

    Vuze (formerly Azureus) is an extremely powerful and configurable BitTorrent client. Search and download torrent files. Play, convert and transcode videos and music for playing on many devices such as PSP, TiVo, XBox, PS3, iTunes (iPhone, iPod, Apple TV).
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    Downloads: 4,103 This Week
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  • 15
    electerm

    electerm

    Terminal/SSH/SFTP client (Linux, Mac, Win)

    electerm is a terminal/ssh/sftp client (Linux, Mac, Win) based on electron/ssh2/node-pty/xterm/antd/subx and many other libs. Works as a terminal/file manager or ssh/sftp client (similar to xshell). Global hotkey to toggle window visibility (similar to guake, default is ctrl + 2) Multi platform (Linux, Mac, Win). Multi-language support (electerm-locales, contributions/fixes welcome) Double click to directly edit (small) remote files. Edit (small) local files with built-in editor. Auth with publicKey + password. Support Zmodem (rz, sz). Support Trzsz (trz/tsz), similar to rz/sz, and compatible with tmux. Transparent window (Mac, Win). Terminal background image. Global/session proxy. Quick commands. UI/terminal theme. Sync bookmarks/themes/quick commands to GitHub/Gitee secret gist. Support serial Port (version > 1.21.8). Quick input to one or all terminals.
    Downloads: 662 This Week
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  • 16
    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.
    Leader badge
    Downloads: 3,510 This Week
    Last Update:
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  • 17

    AppServ

    The easy way to configure Apache, PHP, and MySQL!

    AppServ is an merging open source software installer package for Windows and Linux.
    Leader badge
    Downloads: 2,984 This Week
    Last Update:
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  • 18
    geckodriver

    geckodriver

    WebDriver for Firefox

    geckodriver is an implementation of WebDriver, and WebDriver can be used for widely different purposes. How you invoke geckodriver largely depends on your use case. If you are using geckodriver through Selenium, you must ensure that you have version 3.11 or greater. Because geckodriver implements the W3C WebDriver standard and not the same Selenium wire protocol older drivers are using, you may experience incompatibilities and migration problems when making the switch from FirefoxDriver to geckodriver. Generally speaking, Selenium 3 enabled geckodriver as the default WebDriver implementation for Firefox. With the release of Firefox 47, FirefoxDriver had to be discontinued for its lack of support for the new multi-processing architecture in Gecko. Since geckodriver is a separate HTTP server that is a complete remote end implementation of WebDriver, it is possible to avoid using the Selenium remote server if you have no requirements to distribute processes across a matrix of systems.
    Downloads: 550 This Week
    Last Update:
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  • 19
    Xtreme Download Manager

    Xtreme Download Manager

    Open source download manager

    The project has a new home now: https://xtremedownloadmanager.com/ For developers: https://github.com/subhra74/xdm Xtreme Download Manager is a powerful tool to increase download speed up-to 500%, resume broken/dead downloads and schedule downloads. XDM seamlessly integrates with Google Chrome, Mozilla Firefox Quantum, Opera, Vivaldi and many popular browsers, to take over downloads and saving streaming videos from web.
    Leader badge
    Downloads: 2,042 This Week
    Last Update:
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  • 20
    V2Ray

    V2Ray

    V2Ray is a set of tools for building your own private network

    Project V is a set of tools to help you build your own privacy network over internet. The core of Project V, named V2Ray, is responsible for network protocols and communications. It can work alone, as well as combine with other tools.
    Downloads: 425 This Week
    Last Update:
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  • 21
    Certbot

    Certbot

    Get free HTTPS certificates forever from Let's Encrypt

    Certbot is a fully-featured, easy-to-use, extensible client for the Let's Encrypt CA. It fetches a digital certificate from Let’s Encrypt, an open certificate authority launched by the EFF, Mozilla, and others. This certificate then lets browsers verify the identity of web servers and ensures secure communication over the Web. Obtaining and maintaining a certificate is usually such a hassle, but with Certbot and Let’s Encrypt it becomes automated and hassle-free. With just a few simple commands, you can turn on and manage HTTPS. Certbot runs directly on the web server, so make sure to check with your hosting provider first if you are able to use Certbot.
    Downloads: 408 This Week
    Last Update:
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  • 22
    log4cplus

    log4cplus

    Logging Framework for C++

    log4cplus is a simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. It is modelled after the Java log4j API.
    Leader badge
    Downloads: 2,317 This Week
    Last Update:
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  • 23
    DjVu is a web-centric format for distributing documents and images. DjVu was created at AT&T Labs-Research and later sold to LizardTech Inc. DjVuLibre is a GPL implementation of DjVu maintained by the original inventors of DjVu.
    Leader badge
    Downloads: 1,487 This Week
    Last Update:
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  • 24
    Qv2ray

    Qv2ray

    Linux / Windows / macOS cross-platform V2Ray client

    A cross-platform V2Ray client using the Qt framework. Supports Windows, Linux, macOS, plug-in system support SSR / Trojan / Trojan-Go / NaiveProxy. This is free software, and you are welcome to redistribute it under certain conditions.
    Downloads: 315 This Week
    Last Update:
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  • 25
    v2rayA

    v2rayA

    A web GUI client of Project V

    v2rayA is a V2Ray Linux client supporting global transparent proxy, compatible with SS, SSR, Trojan(trojan-go), PingTunnel protocols. We are committed to providing the simplest operation and meet most needs. Thanks to the advantages of Web GUI, you can not only use it on your local computer, but also easily deploy it on a router or NAS.
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    Downloads: 8,250 This Week
    Last Update:
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