Renoise is amazing. As someone who came from the Impulse Tracker / Scream Tracker 3 days, it blows my mind that we now have trackers with full support for VST effects (including Waves plugins) and VSTi instruments. It's the kind of stuff I dreamed about as a kid in the late 90s.

If you've ever heard music by Celldweller, Blue Stahli or Venetian Snares, they've all used Renoise for some of their music.