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Instant Messaging & VoIP
Free, open chat that aims to provide an open, accessible IM environment.
Cryptocat 2.2 : Main Window
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
Best free MOBA games 2019 to play on your Mac
Essential apps for your MacBook