TransVST is a plugin wrapper, which transforms VST plugins into AAX Plugins.

With TransVST, you can use VST Plugins in Pro Tools 10 and higher.

TransVST runs as a standalone program which offers a luxurious plugin management and integrates any VST plugin in Pro Tools, so that it can be used as a normal AAX plugin. TransVST is already 64bit compatible and so it´s ready for future Pro Tools versions. Furthermore, TransVST supports creative plugin functions like Midi Out, Sidechaining and Multi Outputs.

TransVST has just been released for Mac and PC and costs €69,- / $89,-. 

Features at a glance:

• Multi Output for Effects and Instruments
• Multi Input for Effects (Sidechaining)
• Midi Output
• AudioSuite support
• FXB/FXP Preset Import
• Stereo to Mono
• VST Shell support
• 64bit ready

More here

Manual here