VertexDSP presents the vxPlug. vxPlug can load VST plug-ins within a host application with the ability to control plug-ins from a single user interface. It consists of 2 plug-ins: vxPlugControl and vxPlugClient.
System Requirements: Windows 2000/XP/Vista or Mac OS X 10.3.9/10.4/10.5, and a VST compatible host software.
Price: EUR 39 / USD 49 (special Xmas price)
"vxPlugControl loads VST plug-ins and controls their parameters. Host parameter automation is supported. The point of processing audio in the host application is determined by vxPlugClient. Every instance of vxPlugClient is able to send and receive audio data to/from vxPlugControl. Within vxPlugControl, the audio data is routed to the plug-ins you have loaded before. You can use up to 16 instances of vxPlugControl and up to 128 instances of vxPlugClient." Via