freeware http://lowfrequency.org/interactivity/wiki/index.php?title=User:EvanR			Free externals for using and converting Quaternions in Max/MSP/Jitter. Includes source code as XCode project, BSD license.
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LFO Quaternion Objects	External		Free externals for using and converting Quaternions in Max/MSP/Jitter
lfo.qn2rot	External		Converts a quaternion rotation into jit.gl.* "rotation angle x y z" format.
lfo.qnadd	External		Add two quaternions together, with optional initial argument for quaternion to be added.
lfo.qnconj	External		Calculate inverse (conjugate) of quaternion.
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