World ABS's ProStack and BTT Pro. http://www.worldabs.com/
My stamina has increased (which is great during this dieting stage), and I made muscle gains on it fairly quickly (I could have made the same muscle gains, but probably not so fast).
In the past I have tried the Keto-7, and that also worked, but for only a month or so - as the body gets use to it (your body already makes it, it just starts to compensate for the extra that you are externally taking in).
I also tried the Andiols, and had great massive muscle gains with that stuff - but I also proceeded to have little hairs pop out on my chin! Freaked me out, so I stopped taking those.
I decided I was at my genetic edge after 2 years of competitive BB to try these supplements. This is how I was able to notice results.