arcDev Noise Industries has updated it’s ET-100 bucket-brigade echobox.
ET-200 retains the same sound as the 100, but adds (optional) tempo-syncing and stereo operation.
ET-200 is offered as donationware. If you find yourself using them past a reasonable trial time, please make a donation of your choice to your local branch of the World Wildlife Fund.
Check arcDev Noise Industries for more information and a link to download ET-200.