Numerology is a fun, evolving, creative way to make music. The approach is simple enough; sequencing via familiar methods, but as you use the app, you find the many things you can do with it, the many modulation sources you can make use of, and more. What I really love is the fact that in an hour of using it, I'd written a really great song without even really thinking about it. Numerology makes you really engage in music making in a different way, and I love that.

The app is only on OS X, so sorry to you Windows guys (and I am one, too!), you can't use it... but if you have an OS X machine, this is very worth checking out and giving a try.