• FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Symbian S60
    • BSD
    • Haiku
    qutIM - free open-source multiprotocol ( ICQ, Jabber/GTalk/Ya.Online/LiveJournal.com, Mail.Ru, IRC ) instant messenger for Windows, Linux, MacOS X, OS/2, Symbian, Maemo/MeeGo, Solaris and *BSD.

    Discontinued

    The project seems to be no longer developed. Last versions for Windows, Mac, Linux and other platforms can be still downloaded from the official website.

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  1. Rivers is a free communication and collaboration app that lets you have more organized and focused conversations. Whether you are a part of a company or friend group i.e. community, you will organize your conversations around topics. Create your cube.
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  2. Openfire (formerly Wildfire) is a cross-platform instant messaging (IM) and groupchat server. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber).
    • FreemiumProprietary
    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Kindle Fire
    Paltalk is an instant messaging service that enables users to communicate via internet chat, voice and video chat. It offers chat rooms and the ability for users to create their own public virtual chat room.
  3. Peach lets you share what you feel, think, see, hear, and do—vividly. Peach connects you with friends and gives you freedom, so you can keep up with each other in a real and personal way.
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  4. Get more done – with Grape (also called ChatGrape). Grape is an European Business-Messenger with an On-Premise and Cloud solution. It is GDPR compliant and prioritizes data security and safety.
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  5. ShMessenger Mobile is a free instant messaging client for mobile phones, which supports YMSG (Yahoo!), MSN and GTalk protocols. In just a few minutes, you can chat with your friends on Yahoo!, MSN or GTalk from your mobile phone.

    Discontinued

    Latest version 2011

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  6. Chatzy is a free private chat service which you can use to communicate with people you already know or people who visits your blog or website. With Chatzy you can create a chatroom and send out email invitations very quickly and easily. No registration is required.
    No screenshots yet
    • FreemiumProprietary
    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    4talk IM service is a complete IM service for communicating with your phone contacts using your PC in the office or at home. You can transfer files and messages and access your correspondence from your mobile devices.
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  7. R&Q is a little instant messaging client for the ICQ protocol, fork of Rejetto's &RQ. It is simple, fast, takes a little more than 1 MB disk space and doesn't need setup.
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  8. Engage your team and inspire collaboration with Typetalk, a cloud-based chat app for modern teams.
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  9. FBMessenger is a stand-alone Facebook Messenger app for Linux, very similar to the official Messenger for Windows. It was created by Jack O'Connor, a Facebook Developer.
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  10. YAATA is influenced by the true spirit of Android. It is a SMS/MMS app that has so much to offer. You can personalize and configure this app to your definition of the perfect app. YAATA SMS is very powerful, reliable and the speed of the app is on another level.
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  11. qube-os is a Cloud Computing Operating System. it completely web based. for users qube-os is a free online computer accessible from any device and any browsers. offers 3GB free WebDAV online storage, file sharing, office, calendar, contacts, email client and much more.
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  12. Gyach is a GTK+ based Yahoo! Chat client.

    Discontinued

    The project seems to be no longer developed. Last version, v0.9.8, released in July 2004, can be still downloaded from the official website.

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