Spark

Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and strong security.

Free
Open Source
Mac OS X
Windows
Linux
Self-Hosted

Spark is an Open Source, crossplatform IM client optimized for businesses and organizations. It features builtin support for group chat, telephony integration, and strong security. It also offers a great enduser experience with features like inline spell checking, group chat room bookmarks, and tabbed conversations.

Links to official Spark sites

Features

Extensible by Plugins/Extensions Tabbed interface Group chat

The Best 27 Spark Alternatives

6 Like

shMessenger

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Jabiru

Jabber client for Android.

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Sim-IM

Sim-IM, Simple Instant Messenger, is a multiple protocol instant messenger for MS Windows, GNU/Linux, FreeBSD. Sim-IM supports Jabber/XMPP, Google Talk, ICQ and AIM (Oscar), Yahoo! Messenger and Microsoft Messenger (MSN) protocols.

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KouChat

KouChat is a simple serverless chat client for local area networks (wifi). With KouChat you can communicate with other KouChat users, without configuring a server, or...

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OctroTalk

OctroTalk is an Jabber/Gtalk client with support for GTalk (GMail) audio and Video calls. OctroTalk also supports SIP calling (through a provider of your choice). ...

Free Mac OS X Android iPhone Android Tablet Windows Phone
1 Like

Centericq

Centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu and Jabber protocols.

Free Open Source Mac OS X Windows Linux BSD

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Spark

Links to official Spark sites

Features

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The Best 27 Spark Alternatives

shMessenger

Jabiru

Sim-IM

KouChat

OctroTalk

Centericq

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