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

  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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  • Paessler: Easy to Use With Enterprise Power. Free Trial Icon
    Paessler: Easy to Use With Enterprise Power. Free Trial

    A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.

    You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
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  • 1
    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: 35,215 This Week
    Last Update:
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  • 2
    Moodle

    Moodle

    A free course management system (CMS) to create online learning sites

    Moodle is a Course Management System (CMS), also known as a Learning Management System (LMS) or a Virtual Learning Environment (VLE). It is a Free web application that educators can use to create effective online learning sites. https://moodle.org/
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    Downloads: 2,961 This Week
    Last Update:
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  • 3
    FileZilla®

    FileZilla®

    A fast cross-platform FTP client

    FileZilla® is a cross-platform FTP, SFTP, and FTPS client with a vast list of features, which supports Windows, Mac OS X, Linux, and more. FileZilla's dynamic tools help you move files between your local machine and your Web site's server effortlessly. For example, Filezilla lets you compare your files with in-directory server files to manage file syncing. You can also tab browse between servers and transfer files to them simultaneously, as well as edit server files on the go. And Filezilla is available in 47 languages worldwide!
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    Downloads: 2,639 This Week
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  • 4
    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: 2,343 This Week
    Last Update:
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  • Veeam Data Platform v13.1 - Get Your Free Trial Icon
    Veeam Data Platform v13.1 - Get Your Free Trial

    Secure by design, portable by default. Recover clean, fast, anywhere. Start a free trial.

    Try Veeam Data Platform today. Experience the unified platform that's secure by design, portable by default, and proven to recover clean, fast, and anywhere.
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  • 5
    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: 1,433 This Week
    Last Update:
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  • 6
    Jackett

    Jackett

    API Support for your favorite torrent trackers

    Jackett works as a proxy server, it translates queries from apps (Sonarr, Radarr, SickRage, CouchPotato, Mylar3, Lidarr, DuckieTV, qBittorrent, Nefarious, etc.) into tracker-site-specific HTTP queries, parses the HTML or JSON response, and then sends results back to the requesting software. This allows for getting recent uploads (like RSS) and performing searches. Jackett is a single repository of maintained indexer scraping & translation logic, removing the burden from other apps. Trackers marked with (invite needed) have no active maintainer and may be missing features or be broken. If your client supports multiple feeds it's recommended to add each indexer directly instead of using all indexers. Using the all indexer has no advantages (besides reduced management overhead). We recommend you install Jackett as a Windows service using the supplied installer. You may also download the zipped version if you would like to configure everything manually.
    Downloads: 92 This Week
    Last Update:
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  • 7

    SyncTERM

    Cross-platform BBS (ANSI) Terminal

    A cross-platform ANSI-BBS terminal designed to connect to remote BBSs via telnet, rlogin, or SSH. Supports ANSI music and the IBM charset when possible. Will run from a console, under X11 using XLib, or using SDL.
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    Downloads: 461 This Week
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  • 8
    Motrix

    Motrix

    A full-featured download manager

    Motrix is a full-featured, cross-platform download manager that supports downloading HTTP, FTP, BitTorrent, Magnet, Baidu Net Disk and more. It’s got an interface that’s clean, simple and easy to use, plus a number of great features. It can handle up to 10 concurrent downloads, can support 64 threads in a single task, support speed limit and more! It comes in both Chinese and English with many other translations in the works, and has dark mode available.
    Downloads: 77 This Week
    Last Update:
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  • 9
    theHarvester

    theHarvester

    E-mails, subdomains and names

    theHarvester is a very simple to use, yet powerful and effective tool designed to be used in the early stages of a penetration test or red team engagement. Use it for open source intelligence (OSINT) gathering to help determine a company's external threat landscape on the internet. The tool gathers emails, names, subdomains, IPs and URLs using multiple public data sources.
    Downloads: 55 This Week
    Last Update:
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  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Start Free
  • 10
    phpList

    phpList

    Powerful Open Source Email Marketing app with analytics & segmentation

    phpList delivers Open Source email marketing, including analytics, list segmentation, content personalisaton and bounce processing. Extensive technical features and a secure and stable codebase are the result of over 17 years of continuous development. Used in 95 countries, available in 20+ languages, and used to send 25 billion email campaigns last year. Deploy it with your own SMTP server, or get a free hosted account at http://phplist.com.
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    Downloads: 244 This Week
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  • 11

    UPnP PortMapper

    Manage port forwardings via UPnP

    The UPnP PortMapper can be used to easily manage the port mappings/port forwarding of a UPnP enabled internet gateway/router in the local network.
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    Downloads: 207 This Week
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  • 12
    EdgeVPN

    EdgeVPN

    The immutable, decentralized, statically built p2p VPN

    Fully Decentralized. Immutable. Portable. Easy to use Statically compiled VPN and a reverse proxy over p2p. EdgeVPN uses libp2p to build private decentralized networks that can be accessed via shared secrets.
    Downloads: 31 This Week
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  • 13
    qrcp

    qrcp

    Transfer files over wifi from your computer to your mobile device

    qrcp binds a web server to the address of your Wi-Fi network interface on a random port and creates a handler for it. The default handler serves the content and exits the program when the transfer is complete. When used to receive files, qrcp serves an upload page and handles the transfer. Most QR apps can detect URLs in decoded text and act accordingly (i.e. open the decoded URL with the default browser), so when the QR code is scanned the content will begin downloading by the mobile browser. When sending multiple files at once, qrcp creates a zip archive of the files or folders you want to transfer, and deletes the zip archive once the transfer is complete. When receiving files, qrcp serves an “upload page” through which you can choose files from your mobile. The default configuration file is stored in $HOME/qrcp.json, however, you can specify the location of the config file by passing the --config flag.
    Downloads: 26 This Week
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  • 14
    This project implements a simple STUN server and client on Windows, Linux, and Solaris. The STUN protocol (Simple Traversal of UDP through NATs) is described in the IETF RFC 3489, available at http://www.ietf.org/rfc/rfc3489.txt
    Downloads: 69 This Week
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  • 15
    OpenAS2

    OpenAS2

    AS2 1.1 server implementation in Java

    OpenAS2 is a java-based implementation of the EDIINT AS2 standard. It is intended to be used as a server. It is extremely configurable and supports a wide variety of signing and encryption algorithms. Supports very high traffic volume allowing parallel processing of files per partner. SUPPORT: Please use the Github issues and Discussions channels here: https://github.com/OpenAS2/OpenAs2App/ Requirements: - Java 17 or newer (tested with the LTS versions of Java up to 25) - Any OS that runs Java Planned enhancements in the next major release: - User interace configuration GUI - Certificate Exchange Management IMPORTANT: Java 8 is no longer supported.
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    Downloads: 69 This Week
    Last Update:
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  • 16
    Aeron

    Aeron

    Efficient UDP unicast, UDP multicast, and IPC message transport

    Efficient reliable UDP unicast, UDP multicast, and IPC message transport. Java and C++ clients are available in this repository, and a .NET client is available from a 3rd party. All three clients can exchange messages across machines, or on the same machine via IPC, very efficiently. Message streams can be recorded by the Archive module to persistent storage for later, or real-time, replay. Aeron Cluster provides support for fault-tolerant services as replicated state machines based on the Raft consensus algorithm. Performance is the key focus. A design goal for Aeron is to be the highest throughput with the lowest and most predictable latency of any messaging system. Aeron integrates with Simple Binary Encoding (SBE) for the best possible message encoding and decoding performance. Many of the data structures used in the creation of Aeron have been factored out to the Agrona project.
    Downloads: 13 This Week
    Last Update:
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  • 17
    AWL

    AWL

    Securely connect your devices into a private network

    Anywherelan (AWL) is a peer-to-peer mesh VPN solution designed to securely connect devices across diverse networks without relying on centralized servers. By leveraging WireGuard tunneling and built-in NAT traversal, AWL facilitates seamless device connectivity at the IP level, enabling users to access services like SSH, RDP, or self-hosted applications without complex configurations. Its decentralized architecture ensures that traffic flows directly between devices, enhancing privacy and reducing latency. AWL is particularly beneficial for scenarios such as remote work, gaming, or accessing geographically restricted content.​
    Downloads: 10 This Week
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  • 18

    OS X Portable Applications

    Portable OS X FOSS applications

    OS X FOSS portable applications are packaged so you can carry around on any portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device (or also on your internal hard disk), taking your preferences with you.
    Downloads: 48 This Week
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  • 19
    Agregore Browser

    Agregore Browser

    A minimal browser for the distributed web (Desktop version)

    A minimal web browser for the distributed web. Web Extension support. Built-in Markdown/Gemini/JSON rendering extension. Built-in QR code scanner and generator extension. Generate a QR code for the current page. Scan a QR code from the browser action window. Right-click a link or image to generate a QR code for it. Built-in ad blocker (ublock origin). Built-in support for creating web archives via ArchiveWeb.page.
    Downloads: 9 This Week
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  • 20
    OnionShare

    OnionShare

    Securely and anonymously share files of any size

    OnionShare is an open source tool that allows you to securely and anonymously share files of any size, host websites, and chat with friends using the Tor network. There's no need for middlemen that could very well violate the privacy and security of the things you share online. With OnionShare, you can share files directly with just an address in Tor Browser. OnionShare works because it is accessible as a Tor Onion Service. All you need to do is open it and drag and drop the files you want to share into it, and start sharing. It will then generate an unguessable address which the recipient can open in the Tor Browser to download the files; they won't even need their own OnionShare.
    Downloads: 9 This Week
    Last Update:
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  • 21
    aMSN

    aMSN

    MSN compatible messenger application

    A very nice MSN compatible messenger application, aMSN Messenger is a multiplatform MSN messenger clone. Works pretty much like its Windows based counterpart. Perfect for keeping in touch with those friends who have not yet seen the light. Works on linux
    Downloads: 36 This Week
    Last Update:
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  • 22
    phpBB

    phpBB

    phpBB is the world's leading open source discussion forum software.

    phpBB is the world's leading Open Source flat style discussion forum software. It includes all the features you expect to find in today's top of the line software.
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    Downloads: 32 This Week
    Last Update:
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  • 23
    GeoNetwork opensource - Metadata Catalog
    A web based Metadata Catalog Server for data description and discovery. Supports both generic and geospatial data discovery. It implements international standards (e.g. ISO19115/19139/19119, ISO19115-3, DCAT-AP, CSW 2.0, OGC API Records). It originates from the United Nations and is used by many governments as geoportal software. Active development and discussion takes place on GitHub and OSGeo Discourse. You can also connect directly with the companies supporting the development. Source code available on github https://github.com/geonetwork/
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    Downloads: 159 This Week
    Last Update:
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  • 24
    udt
    UDT: UDP-based Data Transfer Protocol
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    Downloads: 33 This Week
    Last Update:
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  • 25
    A Web-based Usenet News Reader written by PHP, support NNTP/NNRP access to News Server. Authentication can be easily configured with flexibility. It also supports the charset conversion between different Chinese charsets, both Traditional and Simplified.
    Downloads: 19 This Week
    Last Update:
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