http://www.t-u-b-e.de/iplug.htm

QUOTE
tubePlug runs as a VST/AudioUnit plug on MACOSX 10.3.9 or higher (universal binary Intel/PowerPC) and as a VST plug on Win9x, WinME, WinXP. You can use your favorite audio host (e.g. Cubase, Logic, Plogue Bidule, MAX/MSP, PD, etc.). It can connect several tubePlug users via the internet and allows high quality multichannel audio exchange between them and the t-u-b-e venue.

tubePlug is freeware only for non commercial projects. Please take a look at the tubePlug license inside the packages.