Sights and Sounds of Digital Modes

WSJT-X - Digital Modes for Weak Signal Communicaitons in Amateur Radio

Betterbird is a fine-tuned version of Mozilla Thunderbird, Thunderbird on steroids, if you will.

The user-friendly, lightweight, and fast email client

DavMail POP/IMAP/SMTP/Caldav/Carddav/LDAP Exchange and Office 365 Gateway.

eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.

Mailspring for Windows

Postbox mail client

Official desktop application for Proton Mail and Proton Calendar

IMAP & SMTP bridge for ProtonMail.

An email application.

A free email client from Mozilla

Tutanota is an email client with a strong focus on security and privacy that lets you encrypt emails on all your devices.

Chatterino 2 is a chat client for Twitch.tv.

HexChat is an IRC client based on XChat, but unlike XChat it’s completely free for both Windows and Unix-like systems.

HydraIRC is an open-source IRC client with an attractive and easy to use interface.

KVIrc is a free portable IRC client based on the excellent Qt GUI toolkit.

mIRC is a popular Internet Relay Chat client used by millions of people, and thousands of organizations, to communicate, share, play and work with each other on IRC networks around the world

Quassel IRC is a modern, cross-platform, distributed IRC client based on the Qt4 framework.

Beeper is a universal chat app. With Beeper, you can send and receive messages to friends, family and colleagues on **14 different chat networks**, all from a single app.

P2P communications protocol used to send encrypted messages to another person or to many subscribers

An elegant, privacy-focused Facebook Messenger app

Confide lets you take your messages off the record.

CoyIM is a new chat client that is safe and secure by default: no settings to change, no plugins to install, no computer configuration to change.

Digsby - IM, Email, and Social Networks in one easy to use application!

Tiny alternative Discord client with a smaller footprint, snappier startup, themes, plugins and more!

A glossy Matrix collaboration client.

ferdium is a desktop app that helps you organize how you use your favourite apps by combining them into one application.

FluffyChat is a Flutter-based client with a simple and clean UI.

Franz is a free messaging app / former Emperor of Austria and combines chat & messaging services into one application.

Full featured and easy to use Jabber/XMPP client

Gitter. Where communities thrive.

Whether in a 1:1 chat or a dedicated group workspace, Hangouts Chat makes it easy to collaborate with your team in an organized way. Share and discuss Docs, Sheets, and Slides all in one place.

Jami is a free and universal communication platform which preserves the user's privacy and freedoms.

Keybase is a free, open source security app.

Free SMS, Free Voice call messenger application.

Miranda IM is a multi-protocol instant messaging client for Windows.

Miranda NG is a multi-protocol instant messaging client for Windows

Official Nextcloud Talk Desktop client

A Qt/C++17 desktop client for Matrix

Pidgin is a chat program which lets you log into accounts on multiple chat networks simultaneously.

Instant messaging application for the XMPP network

Pushbullet for Windows.

Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one. ALL WILL BE DIFFERENT...

RetroShare is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.

Session is an end-to-end encrypted messenger that removes sensitive metadata collection, and is designed for people who want privacy and freedom from any forms of surveillance.

Fast, simple, secure. Privacy that fits in your pocket

SimpleX - the first messaging platform that has no user identifiers of any kind - 100% private by design!

Skype - VOIP

Slack for Windows

Cloud-based synchronized messaging app with a focus on speed and security

Threema for Desktop.

TIM —— Tencent Instant Messaging

Proprietary multiprotocol instant messaging application

Wassapp is an unofficial desktop client for WhatsApp, the popular mobile application to send and receive free instant messages.

Chat for distributed Teams

Open, free and uncensorable websites, using Bitcoin cryptography and BitTorrent network

Gadget-like Windows Desktop Twitter Client

Whalebird is a mastodon client for desktop application.

All New Webex. In-person or afar, Webex brings everyone together to do exceptional work.

Discord is an all-in-one voice and text chat for gamers that's free, secure, and works on both your desktop and phone.

Discord Canary is Discord's alpha build

Open source SoftPhone (VoIP), Video Conferencing and Instant Messenger

Voice Communication

Jitsi is an audio/video and chat communicator with many useful features.

Desktop application for Jitsi Meet built with Electron.

Open source portable SIP softphone for Windows based on PJSIP stack

Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

Easy to use VoIP softphone with profile and contact management

TeamSpeak Client

Make free phone calls and send text messages

VoIP Client for IP Telephony.