A free, open-source, versatile and easy-to-use client-server messaging system specially designed for dynamic distributed applications
MUSCLE is practical cross-platform client-server messaging system created for a wide variety of applications capable to run under any POSIX-compliant operating system.

MUSCLE is used as a networking component of numerous applications like CueStation, BeShare, CueConsole and many other audio control applications.

Thanks to MUSCLE you can easily send messages from one computer to another over TCP streams, run a muscled server on your Mac, send messaged under any operating system and more.

Note: Detailed installation and usage instructions are available in the HOWTOBUILD.txt files located inside the muscle ZIP file.

Main features:

  • Compatible with numerous operating systems
  • Send messages over TCP streams
  • Customizable built-in 'muscled server'

last updated on:
October 16th, 2014, 11:27 GMT
file size:
2.3 MB
developed by:
Jeremy Friesner
license type:
operating system(s):
Mac OS X
binary format:
Home \ Network/Admin


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1 Screenshot
MUSCLE - When running the muscled command line tool from a Terminal window with the 'help' argument, it will display a usage message.
What's New in This Release:
  • Added a ShrinkToFit() convenience method to the Queue, Hashtable, and String classes. This method shrinks the object so that the amount of memory it has allocated internally matches the size of the data it is actually holding.
  • Hashtable - EnsureSize() and Queue -EnsureSize() now take an optional (allowShrink) argument, that (if set to true) allows the object's internally-allocated array to be reallocated smaller if it is larger than necessary.
  • Tweaked the buffer-expansion behavior of the String class to be a bit more efficient.
  • Added a guard against a potential infinite recursion that could occur while logging an "OUT OF MEMORY" error after" a memory allocation failure, if a LogCallback tried to allocate memory.
read full changelog

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