monoplugs has released b-step version 1.0, a step sequencer VST plug-in for Mac OS X, Windows and Linux, designed for improvisation and easy live use.
You program your melodies live, in a few seconds, and you can't hit a wrong note. b-step is based around the circle of fifths - you don't have to know anything about harmony or music theory, b-step does it for you.
A full featured, 30 minutes limited demo is available at b-step.monoplugs.com/?download-free-demo
Price: 19,99€.