Note trap is a free Max for Cats MIDI effect which lets you create musical patterns in various musical scales and modes. The pattern can be run in sync or free to your Live Set, you can set the velocity data, the direction and more. It's ideal to add some minimalism and/or serialism to your music. Requires Live 9 and Max 6 or up. More info.
This is a free download. Simply add a "0" into the price field. Unless you would like to donate something which is always appreciated.