Two 303's and an 808: http://errozero.co.uk/acid-machine/
Click play (top left) and click the randomize button on the top synth until you get a pattern you like. Then twiddle with the knobs You can select a 909 on the drums too.
When you think you know it all, try: https://www.audiotool.com/app and click rookie acid vintage setup, click past the tour and press the play button on the sequencer. You get 303, 808, 909 and more.