After much consideration, I've decided to take the workout generator I've been developing open source. I've always viewed it as a learning experience for myself, and a canvas of sorts on which I could develop my skills. With it being open source, I hope that other interested developers will join in and help me create something incredible, and that I can learn a thing or two from the code they contribute.
Additionally, I've moved it off of Heroku and onto the same server that hosts this site. The reasoning behind this was that Heroku put many limitations on the growth of the app. I was only allowed a certain amount of bandwidth and usage before I would have to pay. My current hosting plan here allows for unlimited bandwidth and storage, so it seemed to me to be more logical to move it here. It is still accessible from the home page, and http://workout-generator.wbrawner.com/.
If you would like to contribute to the code, you can find the repository at https://github.com/wbrawner/workoutgenerator.