I believe that Audacity supports VST plugins now + it's open source http://audacity.sourceforge.net/
Josh Steiner wrote:
hey all, i'm trying to help thomas grill debug the *awsome* [vst~] object so that i can work with the fruity loops VSTi ... does anyone know any open source/free software VST hosts? I'd like to test the fruity vsti with another host to see if we can peg down these bugs.
i found one called "VST Host" but it does not support the graphical interface of the plugins, which is what i'm testing.thanks.
-josh