Dust Bucket is an experimental dual-path stereo chorus, also capable of rudimentary thru-zero flanging and other simple modulation effects.
Like a bucket-brigade device, it uses fixed length delays with modulated sample-rate. It does not attempt to be a circuit model however; the delays are true stereo and it is designed for clean sound without any non-linear behavior.
It should take automation of most parameters reasonably well. A fairly fast CPU is recommended.