I am the founder of LiveForm (and https://getsimpleform.com before this) and would love to hear feedback from the community :)

Awesome, Formspree is nice. Do you find any thing (feature) missing in Formspree?

Yes. All you have to do to get a working form is change the action of your form to point to the url provided by LiveForm. So, you have complete control of your markup. Other form providers let you embed an iframe which cannot be styled by you to look seamless.

It also has the ability to use recaptcha, and akismet for spam prevention. And also has webhooks which allow you to create custom workflows.

If I may ask what do you use for contact forms / subscription forms in your websites?

Take a look at Hexo, I think it suits your needs. Moreover it is built with javascript so it should be easy to change. I use it for my blog. Moreover you can setup Automatic Deployments to Github Pages using Hexo on Zammu

Not trolling: I've found a pen and paper to be the best tool to draw flow charts and put my mental state on paper.

If you have a couple of hours, you could spend them on learning VIM. It is not the best looking app, but if you plan on writing a lot, your fingers and wrists will thank you when you are old.