Retro Delay is a flexible allround delay effect in VST format.
It has the character and sound of a vintage delay unit but features many modern options.
Besides delays, it can produce a wide range of modulation, chorus, flanger and phaser effects.
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Duckdelay: this is a delay whose output is compressed when there is a certain amount of signal present on its input. It allows to use a lot of delay on a voice without loosing too much intelligibility.
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CowDelay is a simple delay plugin with
internal multimode filter and other gimmicks
like ducking (delay only audible when input
is below certain threshold).
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Fire: It's a sort of multitap delay with panning and controllable morphing between settings.
Instead of controlling each echo separately, there's a bunch of parametrized functions that you can use to generate various kinds of effects from weird reverb to bouncing delays to sonic textures.