Synthstrom Deluge

This looks fun! An alternative is the Maschine+[0] from Native Instruments, a portable version of their hardware DAW that doesn't require a computer.

I have their Maschine Mk3 and it's an amazing piece of equipment, my #1 go-to for composing or improvising. NI's hardware and software quality are top notch.

[0] https://www.native-instruments.com/en/products/maschine/prod...