1. Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once. It has built-in support for NSS, offering client-to-server message encryption for protocols that support it.
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  2. Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once. It has built-in support for NSS, offering client-to-server message encryption for protocols that support it.
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  3. Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing in one application. Itis built on the open source Mozilla Gecko engine, the same code which underlies Thunderbird and is the base for the Firefox browser.
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • PortableApps.com
    • Xfce
    • MacPorts
    • XQuartz
    HexChat is an IRC client based on XChat for Linux , but unlike XChat it’s completely free for both Windows and Unix-like systems. HexChat was originally called XChat-WDK which in turn was a successor of freakschat.
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    • Windows
    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.
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  4. Empathy is 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 and do all your chatting within one application.

    Discontinued

    Empathy is currently unmaintained. Last version, 3.25, released in August 2017, can be still downloaded from the official website.

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    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Self-Hosted
    Quassel IRC is a modern, cross-platform, distributed IRC client based on the Qt4 framework.
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    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • Cygwin
    Irssi is a terminal based IRC client for UNIX systems. It also supports SILC and ICB protocols via plugins.
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  5. Miranda New Generation is a successor of a popular multi-protocol instant messaging client for Windows - Miranda IM . Very light on system resources and extremely fast.
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  6. XChat is an IRC chat program for both Linux and Windows. It allows you to join multiple IRC channels (chat rooms) at the same time, talk publicly, private one-on-one conversations etc. Even file transfers are possible.

    Discontinued

    The program is no longer updated. Last version, 2.8.8, released in May 2010, can be still downloaded from the official website.

    • FreeOpen Source
    • Online
    • Self-Hosted
    • Google Chrome
    A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely. More friendly than other webirc clients giving the general public an easy option to connect to any IRC network.
  7. Textual is the world's most popular application for interacting with Internet Relay Chat (IRC) chatrooms on macOS.
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  8. Textual is the world's most popular application for interacting with Internet Relay Chat (IRC) chatrooms on macOS.
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  9. Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the software developers of Pidgin . Over 250 add-ons allow user customization of, and addition of, features.

    Discontinued

    Site last updated 2013. Site security certificate expired April 2017.

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  10. Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the software developers of Pidgin . Over 250 add-ons allow user customization of, and addition of, features.

    Discontinued

    Site last updated 2013. Site security certificate expired April 2017.

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