I'm really into workouts consisting of bodyweight exercises, with no real equipment needed but yourself. I looked around quickly to see if there was a certification out there for something like this for maybe a class setting but couldn't find anything. Wondering if anyone knows of any that I might've missed? Thanks!
same as Ariadne and Paul. You have already certifications from ACE which are a great base.
I have a recommendations for an additional credential, though. It is not exclusively for body weight exercises but for the population most likely attracted to this type of training. It is the NASM Performance Enhancement Specialist certification. I am working on it myself right now and am really impressed with the framework that is provided for sports performance. A bonus is that you have the reputation of NASM behind it which will give it additional weight.
Yoga, if you learn one of the Ashtanga Vinyasa variations has very much a body only strength component. It requires a significant amount of time to really learn and understand the discipline though.
Keep in mind if you were to add ACE group ex (it looks like you have health coach and personal trainer) you could teach any group ex class you like. I often pitch ideas to places where I teach for various things I want to try out. Last summer when I had more time I did a 20 20 20 for a while: 20 floor cardio, 20 step with weights at slow tempo, 20 core work. If you like strength training without equipment you can design a class that way.
There are so many boutique 'certifications' now. You could likely find something and pay them money, but a national cert. is so much more known, and allows your own creativity to come through.