Hello,
There is a free reverb tool by u-he with which they are trying to get
insights by asking users to send in random codes that they
either hate or like. The VST2 plugin can generate random model and
delay value codes. The idea is to see what works outside of
algorithmic reverbs and into combinations of networked, serial and
parallel delays. The tool is free and has some presets. It is also
possible to save presets. It has a 'send code' button.
It can add up to 20% CPU usage, though, so this is not a typical reverb
unit, hence the prefix 'proto'.
Runs fine in Ardour.
Details:
https://www.u-he.com/cms/179-protoverb