"OldSkoolVerb is a freeware algorithmic reverberation AU and VST plug-in for professional music production applications. This plug-in implements a kind of “classic” stereo reverb algorithm which is technically simple yet optimal. It also produces a very clear spatial image that blends well with the mix.
OldSkoolVerb offers you a comprehensive set of parameters permitting you to achieve various reverbs ranging from plate to hall reverb sound. OldSkoolVerb is best suited for non-percussive and soft-attack sounds like vocals, piano and pad sounds."