Steve Harris http://plugin.org.uk/
1 Pedalboard using it

Retro Flanger

Plugin screenshot
Modulator Flanger

Control Default Min Max
Average stall (ms) 2.50 0.00 10.00
Flange frequency (Hz) 1.00 0.50 8.00
http://plugin.org.uk/swh-plugins/retroFlange v.0:0.0-2