Chat Software for Windows

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

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  • 1
    SimpleX

    SimpleX

    The first messaging platform operating without user identifiers

    Other apps have user IDs: Signal, Matrix, Session, Briar, Jami, Cwtch, etc. SimpleX does not, not even random numbers. This radically improves your privacy. The video shows how you connect to your friend via their 1-time QR-code, in person or via a video link. You can also connect by sharing an invitation link. Temporary anonymous pairwise identifiers SimpleX uses temporary anonymous pairwise addresses and credentials for each user contact or group member. It allows to deliver messages without user profile identifiers, providing better meta-data privacy than alternatives. Many communication platforms are vulnerable to MITM attacks by servers or network providers. To prevent it SimpleX apps pass one-time keys out-of-band when you share an address as a link or a QR code. Double-ratchet protocol. OTR messaging with perfect forward secrecy and break-in recovery. NaCL cryptobox in each queue to prevent traffic correlation between message queues if TLS is compromised.
    Downloads: 26 This Week
    Last Update:
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  • 2
    RetroShare

    RetroShare

    [WARNING] Project has moved to http://github.com/Retroshare/Retroshare

    [IMPORTANT] Retroshare is now distributed on Github. Please go to http://retroshare.net to find the latest releases and sources. RetroShare is a cross-platform, secured and decentralized communication system. It lets you to securely chat, share photos, videos, and more with family and friends, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.
    Downloads: 9 This Week
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  • 3
    WASTE is a mesh-based workgroup tool that allows for encrypted, private communication between distant parties on the internet, independant of local network organization.
    Downloads: 16 This Week
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  • 4
    Secure Internet Live Conferencing

    Secure Internet Live Conferencing

    Secure chat and conferencing protocol

    See http://silcnet.org/ for detailed information. SILC provides common chat and conferencing services like private messages, instant messages, channels and groups, and video and audio conferencing. The main difference to other protocols is that SILC has been designed with security as its main feature. All packets and messages sent in SILC network are always encrypted. Private messages are encrypted end-to-end, channel message are encrypted with channel-wide secret key and secure file transfer is protected peer-to-peer.
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    Downloads: 26 This Week
    Last Update:
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  • 5
    A fork of WASTE 1.5.0.408 beta 3 starting form 1.5.1.412 beta 3
    Downloads: 7 This Week
    Last Update:
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  • 6
    GoldBug - Encrypted Communications

    GoldBug - Encrypted Communications

    Chat Messenger. E-Mail-Client. Websearch. Filetransfer.

    GoldBug is a decentralized & secure communication suite that offers an integrated e-mail client, an instant messenger & a file transfer. Also included is an URL-RSS-DB & a p2p web search. Current vers. w/ McEliece Algorithm. GoldBug has been 2013 - 2023 ten years just another Graphical User Interface of the Spot-On Encryption Suite. Main GUI features: Minimal & colorful Interface with Tabs in the East. Microsoft & Qt MinGW deprecated Win32 & for Compiling: ● https://sourceforge.net/p/goldbug/wiki/compiling As Spot-On implemented the minimal GB-concept & Nuvola Icons, GoldBug has now been fully integrated into Spot-On Win64: Just choose Tabs at East & Mini-View in Options - w/ Nuvola Icons of course! Voilá! & Many Thanks, Pro-Files can be found archived at ● current source: https://github.com/textbrowser/spot-on ● EN Manual: https://www.amazon.com/dp/3749435065 ● DE: https://compendio.github.io/goldbug-manual-de/ ● Study: https://www.amazon.com/asin/dp/3750408971
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    Downloads: 11 This Week
    Last Update:
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  • 7
    Luadch

    Luadch

    We moved to GitHub! -> http://luadch.github.io/

    We moved to GitHub! New Website: http://luadch.github.io/ There you will find all the necessary informations.
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    Downloads: 9 This Week
    Last Update:
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  • 8
    Smoke Crypto Chat Messenger for Android

    Smoke Crypto Chat Messenger for Android

    Smoke: Android Crypto Chat Messenger

    Smoke is an encrypting chat messenger for Android written in Java. Please read the Web site for more information: https://textbrowser.github.io/smoke/ (original, current) https://www.amazon.com/dp/3752691999/ https://smokeappope.sourceforge.io/ (old, third party archive) Smoke App OPE - Open Personal Encryption Download Android APK Installer: https://sourceforge.net/projects/smokeappope/files/ Smoke Source: https://github.com/textbrowser/smoke SmokeStack Source: https://github.com/textbrowser/smokestack (Android) https://github.com/textbrowser/spot-on (Desktop) Smoke appears to be one of the first projects with an open source mobile encrypting chat server., an decentralized and easily-configurable chat server. Smoke is known as the first mobile McEliece Messenger: https://tarnkappe.info/artikel/english/mceliece-messaging-smoke-crypto-chat-the-first-mobile-mceliece-messenger-published-as-a-stable-prototype-worldwide-279847.html
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    Downloads: 6 This Week
    Last Update:
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  • 9
    ufonet

    ufonet

    UFONet - Denial of Service Toolkit

    UFONet - Is a set of hacktivist tools that allow launching coordinated DDoS and DoS attacks and combine both in a single offensive. It also works as an encrypted DarkNET to publish and receive content by creating a global client/server network based on a direct-connect P2P architecture. + FAQ: https://ufonet.03c8.net/FAQ.html -------------------------------------------- -> UFONet-v2.0 [R3D] "R3DST4R!" (.zip) -> md5 = [98fcd2bd3bba3f1d52738113522d3bc9] -> UFONet-v2.0 [R3D] "R3DST4R!" (.tar.gz) -> md5 = [13337a1853e144a425836c3f75ed3948] --------------------------------------------
    Downloads: 3 This Week
    Last Update:
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  • 10
    The Mobility Project wants to make communication simplier and more secure. We use Free (as in Freedom) Software to create tools that are powerful, but also intuitive.
    Downloads: 1 This Week
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  • 11
    IP-Chat

    IP-Chat

    UDP based desktop chatting app which supports AES-256 bit encryption.

    Simple Encrypted chat application built with Java. It uses AES-256 bit block cipher algorithm.
    Downloads: 1 This Week
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  • 12
    Secure Java Instant Messenger. Supports asymmetric key encryption of messages. will support multiple protocols (Jabber initially) and multiple UIs.
    Downloads: 1 This Week
    Last Update:
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  • 13
    After installed on one computer, it captures MSN chat across all computers in the same LAN, analyze and save into database for future analysis.
    Downloads: 1 This Week
    Last Update:
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  • 14
    This ain't your daddy's crypto! We provide a set of C libs and utilities to perform cypherpunk style crypto functions, using your existing OpenPGP keys. Ring signatures; credentials; mental poker; timelines; zero knowledge proofs. Cool stuff!
    Downloads: 0 This Week
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  • 15

    Absolutely Safe Chat

    p2p (sockets) chat with inKey encryption (32768 bit).

    p2p (sockets) chat with "inKey 6.0" encryption (key size up to 32768 bit), written on CBuilder 6.0. source code included P.S. http://sourceforge.net/projects/inkey/
    Downloads: 0 This Week
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  • 16
    Ariesbot, is an ircbot, which will be able of doing basic bot functions such as op/deop/kick/ban/moderate. Plus being able to Wu-Ftpd scans, cgi/php scans port scans, subnet scans and scan for vuln version of apache to nosejob.c.
    Downloads: 0 This Week
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  • 17
    BlackBelt WASTE - ipv4 / Tor / i2p + AI

    BlackBelt WASTE - ipv4 / Tor / i2p + AI

    A modern, AI-Smart, WASTE p2p for ipv4 and invisible address spaces

    A WASTE client. Download and create your own WASTE networks. For Windows XP 32/64, Vista 32/64, Win7 32/64, Win8 32/64, Win 10, Linux (WINE). *** NEW *** Distributed Autonomic-Performance-Tuning - A Goal-Seeking Swarming-Semiotic AI *** *** Built-in Self-Organising Anti-Spoofing Technology *** *** Medusa - Pure Ephemeral RNG - Routing, Security Extensions *** PLEASE ENSURE YOUR NETWORK USES THE SAME BUILD. FOR BEST RESULTS.
    Downloads: 0 This Week
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  • 18
    An original bruteforce-based encryption/decryption system. BBE was originally conceived to chat with encrypted text on IRC. mIRC and X-Chat support BBE via script addon. BBE can also encrypt MIME encoded files. Blowfish encryption is currently supported.
    Downloads: 0 This Week
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  • 19
    This program allows you to establish cryptographically secure and decentraliced conversations over untrusted telecommunication links and IRC networks.
    Downloads: 0 This Week
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  • 20
    A secure collaborative framework that is being used by other projects such as CFAgent (online customer service), CFWeb (pure HTTP communication for CFAgent) and much more in addition to serving as a standalone all-in-one collaboration platform by itself.
    Downloads: 0 This Week
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  • 21
    Chativa Pro — Self-Hosted E2EE Chat

    Chativa Pro — Self-Hosted E2EE Chat

    HD Audio & Video Calls, AI chatbot widget, Widget, Lifetime License

    Chativa Pro is a self-hosted, end-to-end encrypted (E2EE) messaging platform for SMEs. Protect your business secrets with private text, audio, and video conversations. Your data, your server, your rules. ══════════════════════ KEY FEATURES ══════════════════════ 🔒 E2EE Chat — Every message, file, and call is encrypted 📹 HD Video Calls — WebRTC-powered, one-on-one and group 🤖 AI Assistant — Gemini-powered smart replies and summaries 💬 Chat Widget — White-label, one script tag 🏠 100% Self-Hosted — Your server, works offline 💰 Lifetime License — $79 once, unlimited agents, no fees 🛡️ GDPR Compliant — Your data stays in your jurisdiction ══════════════════════ PERFECT FOR ══════════════════════ SMEs • IT Consultants • Agencies • Privacy Advocates
    Downloads: 0 This Week
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  • 22

    Ciphero

    Secure communication software

    Securely cipher your message or file, share it, safely de-cipher it.
    Downloads: 0 This Week
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  • 23
    e3 = jabber + java + plugins + svg ||| web start link: http://complat.sourceforge.net/jnlp
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    Downloads: 0 This Week
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  • 24
    With this application you can encrypt texts or files and chat with friends. You can download a early Android version of the chat client from here: https://drive.google.com/uc?export=download&id=0BwePHaWdtoMweWRyMExqbHZyUEk Hint: I started this project because i have fun to write java apps. This app is not professional. I don´t recommend using this to encrypt very important data (for example of your company ...). Keep this in mind. Happy testing! ;) Please check MD5 after Download. You can find this on the official site of this project (german). You can find a link to this very simple site below. How to start: -------- Windows: double-click on CryptolinN.exe -------- Linux: sh CryptolinN.sh OR FIRST chmod +x CryptolinN.sh THAN ./CryptolinN.sh -------- Console: java -jar CryptolinN.exe --help N = version number
    Downloads: 0 This Week
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  • 25
    Dirt

    Dirt

    An IRC proxy to add chat encryption to IRC clients

    Dirt is a multi-platform IRC proxy that adds FiSH-compatible chat encryption (including DH1080 key exchanges) to any IRC client. It can be used as a SOCKS proxy or as a simple bouncer. For security reasons, only localhost connections are allowed.
    Downloads: 0 This Week
    Last Update:
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