Instant Messengers

Adium
Adium
A free and open source instant messaging application for Mac OS X that can connect to AIM, XMPP (Jabber), ICQ, IRC and more. Based on the libpurple protocol library, Adium can…
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Caprine
Caprine
An unofficial and privacy focused, open source Facebook Messenger app with many useful features…
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Citadel
Citadel
An open source collaboration messaging and groupware suit which is designed to run on open source operating systems such as Linux or BSD. Citadel is a highly integrated Groupware…
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CoyIM
CoyIM
A standalone chat client that focuses on safety and security. It is a self-contained program that runs on Windows, Linux and macOS. CoyIM only supports one chat protocol…
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Discord
Discord
A proprietary and free to use VoIP client designed for gaming communities, that specializes in text, video and audio communication between users in a chat channel…
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EKG2
EKG2
An open source, multi-platform, multi-protocol, and plugin-based, instant messenger with a Gtk+ 2 GUI or a console UI, for UNIX-like operating systems…
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Empathy
Empathy
A messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services…
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Gajim
Gajim
A full featured and easy to use XMPP/Jabber client which works nicely with GNOME, but does not require it to run. Jabber allows users to use gates for other services…
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Kadu
Kadu
An open source Gadu-Gadu and Jabber/XMPP protocol Instant Messenger client for Linux, BSD and Windows…
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Kopete
Kopete
an instant messaging client designed to be modular and plugin based. The goal of Kopete is to provide users with a single easy-to-use way to access all…
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LoquiIM
LoquiIM
A mobile messaging app that allows users to use their chat accounts from different providers with just one simple interface. The app is currently available only…
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Messenger for Desktop
Messenger for Desktop
A simple & beautiful desktop client for Facebook Messenger. Chat without distractions on OS X, Windows and Linux. Not affiliated with Facebook…
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Pidgin
Pidgin
Pidgin (formerly named Gaim) – a chat program which lets you log in to accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on MSN…
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Pork
Pork
A console based client for the AOL Instant Messenger service that uses the ncurses screen library. Pork is intended to be fast, useable, and stable…
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Psi
Psi
A free instant messaging application designed for the XMPP network. Fast and lightweight, Psi is fully open-source and compatible with Windows, Linux, and…
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Ring
Ring
Ring (prevoiusly: SFLphone) – a free software for universal communication which respects the freedoms and privacy of its users. It is published under the GNU General Public License 3…
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Skype
Skype
An application which lets users to make voice or video calls and keep in touch via an instant message system. It is available for many devices and operating systems such as…
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Telegram
Telegram
An open source messaging app with a focus on speed and security which is available for several platforms, such as: Linux, OS X, Windows, Android, iOS, and as a web…
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Tkabber
Tkabber
A free and open source GUI client for the Jabber instant messaging system. It’s writen in Tcl/Tk, and works on many platforms, such as Linux, FreeBSD, NetBSD, Solaris,…
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TOR Messenger
TOR Messenger
A cross-platform chat program that aims to be secure by default and sends all of its traffic over Tor. It supports a wide variety of transport networks, including…
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Viber
Viber
a free and multi-platform messenger for voice and video conferencing, which also allows you to send text messages and image files at the same time…
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WhatsApp
WhatsApp
A free messaging and VoIP app available for iPhone and other smartphones, and desktop/laptops running under Windows or OS X. WhatsApp uses…
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Whatsie
Whatsie
A simple & beautiful desktop chat client for WhatsApp Web for Linux, Windows and OS X platforms. Not affiliated with WhatsApp or Facebook…
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