Ranking of Go Software
Obviously, AlphaGo is the top AI now. Besides it, a simple way to find information about Computer Go Ranking would be to search for :


  Computer go tournament


Here is a list of Go AI from wikipedia

There's a special website called Computer GO that registers past and future tournaments.

There's also a website for KGS Computer Tournaments

According to the KGS tournament, the actual ranking is : 


Zen
DolBaram
abakus
Darkforest
Hira
Aya


As for commercial AIs, I don't think their level match the ones quoted here. It would require much hardware resources to run on a smartphone or a personnal computer.