In addition to Tetra SafeStart there's Dr. Tim's One and Only, Seachem Stability, API Quick Start...
I know the first working one was Bio-Spira, and it was invented by Dr. Tim. Then Tetra SafeStart was basically a re-branded Bio-Spira.
Since "One and Only" is also by Dr. Tim, I believe it is just a different name for the same product.
I have heard SeaChem Stability and API Quick Start, although I can't confirm if they really work. If they indeed can permanently cycle a fish tank, maybe they too are just rebranded Bio-spira?