UnitedPlugins has discounted MorphVerb for two weeks.
MorphVerb covers all reverb types you could think of - Spring, Ambience, Echoes, Room, Chamber or Plate. It also features great spaces like Hall or Cathedral and your reverb can even be Infinite.
MorphVerb fills the gaps between reverb styles and gives almost infinite possibilities. As the name suggests you can not only switch between the reverb types. MorphVerb gives you a chance to blend smoothly between any two neighbouring types.
Furthermore, MorhpVerb provides advanced features like Ducking which makes sure that your tracks won't drown in the reverb. The reverb sound can be saturated and compressed. And you have a choice between 2D and 3D GUI - depending on your taste.