http://gpuimpulsereverb.de/

GPU Impulse Reverb VST is an effect plugin that calculates convolution reverbs by using your graphics card as DSP for realtime reverb calculation with a CPU usage of near 0%. Any consumer graphics card that supports OpenCL (NVIDIA / ATI or others) can be used without any need for other specific hardware. All common VST hosts are supported, such as Cubase, Nuendo, Reaper, Fruity Loops and others.

A public demo is available, free to try for everyone.

Features include…

Low latency, only one ASIO block size
Supports Stereo & True Stereo processing (quad-channel impulse responses)
Supports 16, 24 and 32 bit responses
Supports as many instances as your GPU can handle
2-Band EQ
Adjustable Attack/Release & Length Envelope
File Browser for easy access of IRs
…and much more



Looks useful as hell to me

 

I tried it some time ago - it is good but there is no cracked version available and for me there is no need to buy it because...
... if you have a nvidia card you should try this: Reverberate LE CUDA
I can use literally unlimited instances of this with my gtx660...