2.2
Free
Jitsi
Jitsi: Free Instant Messaging for Mac Users
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Comprehensive Overview of Messages for Mac
Free MSN Messenger Patch for Mac Users
Efficient Twitter Management with Tweetbot for Mac
Integrated messenger for AOL, ICQ ,Yahoo and MSN
A full version program for mac
Effortless Facebook Access on Mac
A free program for Mac, by messenger.
A free app for Mac, by Chengyu Huang.