Years ago, Optimum Training Systems (OTS they liked to be called), with Leo Costa, had a program called the Titan Training System. It was pretty damn similar to FST-7, but it was different given that it was about 8 years ago that it came onto the market. Didn't really do well, as many of OTS' systems, but the principles within I really enjoyed.
The focus or core of the Titan System was that you do what they call "Muscle Rounds." Much like the last set of FST. I don't remember the exact parameters of how they're placed in your routine or what everything else around them were, but I do remember that you do sets of 4 reps, rack the bar for 5-10secs and repeat. I want to say you're supposed to do 10 of these mini-sets. They advocated doing larger movements, benches versus flyes, IIRC.
Really, the Titan System and FST, are just derivatives of Rest-Pause training with a minor little tweak here and there. At least that's how I see it.