Open Source Windows Communications Software - Page 6
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Communications Software for Windows
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Mumble
Mumble is an open-source, low-latency, high quality voice chat
Mumble is an open-source, low-latency, high-quality voice chat software. There are two modules in Mumble; the client (mumble) and the server (murmur). The client works on Windows, Linux, FreeBSD, OpenBSD, and macOS, while the server should work on anything Qt can be installed on. Low-latency and high-quality voice-chat program written on top of Qt and Opus. Administrators appreciate Mumble for being able to self-host and have control over data security and privacy. Some make use of the extensive permission system for complex scenarios (for example separating two groups but leaders being able to talk to both). Some love to provide their users with additional functionality with scripts making use of server APIs, or host music bots and the like that connect to the server. Those that have an existing user database often make use of authenticators to allow authenticating with existing account login data. -
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OptiKey
Open source assistive on-screen keyboard that runs on Windows
OptiKey is an assistive on-screen keyboard designed to bring keyboard control, mouse control and speech to people with motor and speech limitations. Completely free, open source and compatible with low cost eye-tracking devices, it is a great alternative to often expensive and complicated AAC (alternative and augmentative communication) products. It can also be used as an alternative to a physical keyboard or mouse. OptiKey runs on Windows and works right out of the box once an eye-tracking device is installed. Without an eye-tracking device however it can still be used with a mouse or webcam. -
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Proton Mail Bridge
Proton Mail Bridge application
Proton Mail Bridge is a desktop application that runs in the background on Windows, macOS, and Linux to enable users to access their Proton Mail encrypted email accounts with traditional email clients like Outlook, Thunderbird, Apple Mail, and others via local IMAP/SMTP servers. Because standard IMAP cannot natively decrypt end-to-end encrypted messages, Bridge acts as a translator that downloads encrypted mail, decrypts it locally, and serves it to your preferred mail client over a local server, while encrypting outgoing messages before they’re sent to Proton’s servers. It provides a seamless integration layer for users who need offline support, familiar local client workflows, or tighter integration with desktop tools while preserving Proton’s zero-access encryption model. The Bridge app continues running even when its GUI is closed so that mail clients can remain connected and synchronized, and it supports automatic startup and robust credential handling via secure storage. -
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Tribler
Privacy enhanced BitTorrent client with P2P content discovery
Tribler is a decentralized, privacy-enhanced BitTorrent client developed by researchers at Delft University of Technology. It introduces built-in anonymity using a Tor-like onion routing network and integrates its own blockchain for economic incentives and trust management. Tribler supports standard torrenting features along with distributed search, self-contained channels, and peer reputation. Its goal is to provide a fully autonomous file-sharing network without relying on external servers, search engines, or trackers. -
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This is an eMule mod based on the Xtreme mod. It's created by MaxUpload and Stulle to extend the Xtreme mod with numerous other features.
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Gtk-Gnutella
A GTK+ Gnutella client, optimized for speed and scalability
A GTK+ Gnutella client, efficient, reliable and fast, written in C. It has been optimized for speed and scalability, with low-memory consumption. It is meant to be left running 24x7, using little CPU and only the configured bandwidth. It is possible to run gtk-gnutella without a GUI or using a shell interface. -
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KB1OIQ - Andy's Ham Radio Linux
Install ham radio software on Debian Live, RPi OS, or Ubuntu Linux
Latest Version: - Version 26e: November 2025 Version 26 ======== Version 26 can be installed on top of Debian Live, Raspberry Pi OS, or any supported flavor of Ubuntu Linux. The supported Linux flavors are listed in the GETTING_STARTED document. An installation script does all of the work. Please download and READ the installation instructions: https://sourceforge.net/projects/kb1oiq-andysham/files/v26e/GETTING_STARTED Watch a video of Andy (KB1OIQ) as he talks about AHRL during a ham radio convention in MA in the summer of 2025: https://www.youtube.com/watch?v=hwuKZK1dKcU&t=2086s Several videos of Andy's complete AHRL presentation can be found on YouTube. Here is one made in March 2026: https://youtu.be/xv9YnREmeAA?si=yMTX8yJsQFyeJG0i -
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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 11 or newer (tested with the LTS versions of Java up to 21) - 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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Mailspring
A faster, leaner email client and fork of Nylas Mail
Mailspring is a fast and lean mail client that’s a new version of Nylas Mail. It’s maintained by one of Nylas Mail’s original authors, with plenty of great features and enhancements such as a new C++ sync engine that allows it to use 50% less RAM. Heavy dependencies have also been removed and the package manager rewritten for even greater speed. Written in TypeScript with Electron and React, it is cross-platform (macOS, Windows and Linux) and designed to be easy to extend. -
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Miru
Bittorrent streaming software for cats
Miru is a fast, open-source anime streaming client that integrates with various third-party APIs and websites to provide a native-like experience across platforms. Designed for performance and ease of use, Miru allows users to search, stream, and manage their favorite anime shows with a sleek interface and community-driven extensions. It emphasizes responsiveness, privacy, and modularity while supporting a growing plugin ecosystem to expand content sources and features. -
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mendelson AS2
Implementation of the EDIINT AS2 protocol (RFC 4130)
mendelson AS2 is the JAVA-based open source EDIINT AS2 solution. Monitoring- and configuration GUI, async & sync MDN, signatures, encryption, TLS, web interface, pluggable into any servlet container, partner manager, certificate manager, data compression, optional profiles: MA, FN. Localized to Spanish, Italian, Portuguese, German, English, French. -
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WinLIRC, the Windows port of the Linux Infrared Remote Control package. Control your computer via remote!
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Tox
A New Kind of Instant Messaging
Tox is a peer to peer (serverless) instant messenger that focuses on security and privacy. In today's world where digital surveillance is rampant, Tox offers users a communication software alternative that's free from prying eyes and ears, and is, quite literally free and without advertising. Tox comes with all the great features you'd expect from an instant messenger application, including voice calls, video calls, file sharing and screen sharing. Everything done on Tox is encrypted using open-source libraries so you can be assured of completely private conversations. It also has no central servers that can be raided, shut down, or forced to turn over data. There are no corporate interests, no hidden agendas-- just simple, secure and easy to use messaging. -
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MSI Downloader
MSI installers for a wide range of software and utilities
MSI Downloader has been created for IT professionals who want a quick and easy method of downloading the latest MSI installers for various software. MSI installers are much easier to use for deployment using systems like Group Policy, Microsoft Deployment Toolkit (MDT) and Microsoft System Center Configuration Manager (SCCM). Some publishers happily supply MSI installers for their software, however, some are very hard to find. So this new tool will not only be providing the easy to find MSI installers, but also the hard to find ones and in some cases, the impossible to find ones - ones where we will create the MSI installers for them! The aim to keep all the MSI Installers within our utility fully up to date, but if you find something that is not, please let us know and we will correct it. -
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emule client, based on official emule version (see www.emule-project.net) many enhancements and bugfixes, for details see provided changelog supported languages: for xtreme features: english, for all official emule client features: english, german, spa
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Xtreme Download Manager
Powerfull download accelerator and video downloader
Xtreme Download Manager is a powerful tool to increase download speed up to 500%, save streaming videos from websites, resume broken/dead downloads, and schedule and convert downloads. XDM seamlessly integrates with Google Chrome, Mozilla Firefox Quantum, Opera, Vivaldi and other Chromium and Firefox-based browsers, to take over downloads and saving streaming videos from web. XDM has a built-in video converter which lets you convert your downloaded videos to different formats so that you can watch them on your mobile or TV (100+ devices are supported) XDM can download streaming content from most websites. The best way of downloading webpage embedded videos from the Internet is here. After installing XDM, the "Download Video" button pops up whenever you are watching a video anywhere in the Internet. Just click on the button to start downloading clips. XDM supports all popular browsers including Google Chrome, Firefox Quantum, Vivaldi, Opera and many other browsers on Windows. -
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Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search, etc.. Artha may be used as a free open-source replacement to the proprietary WordWeb Pro.
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Go File
Go-based file sharing tool, single executable file only
Go File is a minimal file hosting and management service built with Go, designed to provide a fast and efficient way to upload, store, and share files through a web interface. The project prioritizes performance and simplicity, leveraging Go’s concurrency model to handle file operations efficiently. It offers a straightforward approach to file management, allowing users to upload files and access them through generated links without requiring complex configuration. The service is suitable for self-hosting, making it an attractive option for developers who want control over their file storage and sharing infrastructure. Its design emphasizes lightweight deployment, enabling it to run on modest hardware or cloud environments with minimal overhead. Go-File also supports basic file organization and retrieval, making it practical for both personal and small-scale team use. -
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Pixiv Batch Downloader
Batch download artworks and novels, filter works, etc.
Chrome extension to batch download illustrations and novels from Pixiv. Filter artwork, rename while downloading, convert dynamic images, and more. Powerful Pixiv batch downloader. Batch download artworks and novels, filter works, rename when downloading, convert animated images, and more. Pixiv Image Batch Downloader is installed in the browser, when you want to download, you don't have to leave the browser. You just need to click the download button on the page to open the download interface directly. If you're downloading multiple illustrations, you don't have to download them one by one. The batch download function of the downloader is very powerful. You can download in batches on the illustration page, as well as the work list page, collection page, rankings and other pages. You can even enter a list of ids directly to create batch downloads. Pixiv Image Batch Downloader allows you to set rich filter conditions to customize your downloads. -
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mailsend
A program to send mail via SMTP from command line
mailsend is a simple command line program to send mail via SMTP protocol. It can send a piece of alert mail from a program in a networked Windows machine. It's feature-filled, cross-platform, free and open source, and does not use any config file. -
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RSS Owl | RSS / RDF / Atom Feed Reader
RSS Owl is a powerful application to organize, search and read feeds.
RSS Owl is a powerful application to organize, search and read your news feeds in a comfortable way. It runs cross platform on Windows, Linux and Mac and can also be installed into Eclipse. RSS Owl is translated into the popular languages of the world. Some of the unique highlights are tabbed reading, powerful searches that can be saved, news filters with automated actions, embedded browser and newspaper layout, tray notifications, clean-up wizard and powerful user customization. RSSOwl requires no installation, simply start it with a doubleclick and find a large list of sample feeds already provided. For your convinience, an installer is provided on Windows. On Linux, you can obtain RSSOwl from the online repository (http://www.rssowl.org). You can also easily import existing feeds from other readers into RSSOwl. -
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King Phisher
Phishing Campaign Toolkit
King Phisher is an open source tool that can simulate real world phishing attacks. It has an easy-to-use, flexible architecture that allows for full control over both emails and server content. It is useful for running awareness campaigns and training, and can only be used for legal applications when the explicit permission of the targeted organization has been obtained. -
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Raven Reader
All your articles in one place. Beautiful
All your articles in one place, are beautiful. Exporting feed in OPML format. Importing feeds. Windows support. Linux support. Offline reading. Keyboard Shortcuts. Sidebar count. Text size configuration. Text font style configuration (Currently has Playfair Display, Muli, Open Sans, and Roboto Slab). Supports categorizing of the feeds. macOS touch bar shortcuts. Integration with read-it later apps: Pocket, Instapaper. Podcast support. Subscribe to podcast RSS feed and listen within the app. Accessibility Friendly, Feedbin integration (Folders are WIP). Inoreader integration. Google Reader API support. Supports self-hosted RSS Services like FreshRSS.org etc. (Folders are WIP). Support for subscribing to Youtube channels and viewing within the app. Flexible resizing of columns/panes. Please feel free to suggest more ideas to improve this app. -
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Telegram Web A
Telegram Web A, GPL v3
Telegram Web A is a full‐featured web client implementation for Telegram, built from scratch as a lightweight, modern single-page application. It uses a custom front-end framework (called “Teact”) that re-implements React-style paradigms and pairs them with a custom version of the MTProto library (based on GramJS) to interact with Telegram’s backend infrastructure. The project achieved recognition (winning first prize in the Telegram Lightweight Client Contest) and serves as the code base behind the official web client available at web.telegram.org/a. The architecture takes advantage of advanced browser capabilities: WebSockets for real-time messaging, Web Workers and WebAssembly for performance-critical tasks, multi-level caching and PWA features for offline or near-offline usability, voice recording and media streaming, raw binary data handling and cryptographic operations. It also handles rich UI/UX elements such as CSS/Canvas/SVG animations, reactive data streams, etc. -
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message-pusher
Build your own message push service, support multiple message push
message-pusher is a lightweight notification service designed to send real-time messages across different channels, enabling developers to deliver alerts, updates, or system events efficiently. The project focuses on simplicity and flexibility, allowing users to configure message delivery without relying on complex infrastructure or heavyweight messaging systems. It supports integration with various notification platforms, making it useful for monitoring systems, automation pipelines, or personal alerting setups. The tool is built to handle asynchronous message delivery, ensuring that notifications are sent reliably even under varying network conditions. Its architecture emphasizes ease of deployment, allowing developers to run it locally or host it in lightweight environments such as containers. Message Pusher is particularly valuable for scenarios where timely communication is critical, such as DevOps monitoring, system health alerts, or workflow automation.
