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Instant Messaging & VoIP
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questions & answers
Free, open chat that aims to provide an open, accessible IM environment.
Spark by Jive Software
Spark is an open source, cross-platform instant messaging client for businesses.
Jitsi (previously SIP Communicator) is an audio/video and chat communicator that supports protocols such as SIP......
A chat-based workspace in Office 365 with private group conversations.
New beta versions for iOS, iPadOS, tvOS, and watchOS
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