DR-Verb is a High quality Reverb plug-in which emulates any room from small rooms to "Hall" or "Church" large rooms. Thanks to its large number of controls and to its EQ section, this reverb can also be used to produce strange ambiences or even FX sounds. Just Play with the parameters and experiment by yourself.
As the author (Dragan) made a great programming work, this plug-in only use about 30% of the CPU on a G3-300 (in the "FULL" mode with 3 bands Parametric EQ.) which is really small for a complex reverb algorithm.