SynthGeek has introduced SG-UglyVerb, a free Windows reverb plugin:

There are times when I want a reverb for its smearing, tail-producing qualities, but a regular reverb isn’t ugly enough. This was created to solve that problem. It sounds just like the name implies, and sometimes that’s just what the situation calls for.

If you give it a try, leave a comment and let us know what you think of it.