This one looks interesting and got good reviews by the people in KVR but requires registration in order to download:



Nebula2 Free

VST Plugin based on Volterra Kernels Series.
It emulates different types of vintage gear: equalisers, filters, microphones, preamps, compressors, reverb and generic time-variant processors (chorus, flangers, phasers).

http://www.acusticaudio.com/modules....le=nebula2free