Nicholas Piël » ZeroMQ an introduction

ZeroMQ is a messaging library, which allows you to design a complex communication system without much effort. It has been wrestling with how to effectively describe itself in the recent years. In the beginning it was introduced as ‘messaging middleware’ later they moved to ‘TCP on steroids’ and right now it is a ‘new layer on the networking stack’.
via nichol.as

IPython's moving to 0MQ for their client/server model. Some elements of yt likely will as well -- specifically the remote push/pull of updated image buffers for the remote pan-n-scan.

Tagged 0mq code python
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