gerzonic.net have released version 1.0 of a complete line of free ambisonic VST plug-ins for Mac OS X (Mach-o format) and Windows.
bPlayer is a first and second order ambisonic file player (plays 4 channel wxyz and 9 channel fmh files).
bRec records the files bPlayer can play.
Emigrator is a second order ambisonic decoder.