Agora
http://en.wikipedia.org/wiki/Agora
also an OOP language based on Message Passing (Messaging) rather than delegation
http://en.wikipedia.org/wiki/Agora_%28programming_language%29
http://prog.vub.ac.be/research/agora/
http://prog.vub.ac.be/research/agora/agorageneral/message.html
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