Silverspike Reverb.it computes diffuse reflections of rooms of nearly arbitrary size, ranging from rehearsal rooms to cathedrals. It delivers smooth and dense reverberation paired with realistic, unobtrusive stereo imaging.
Up to three independent reverb bands give sophisticated control on the spectral balance. Audio precision is 32 bit and the plug-n supports samplerates up to 96 kHz.

Full version can be ordered online at http://www.silverspike.com