I am in the pre-alpha stage of building what is going to be a free and modern flop analysis tool similar to FlopZilla. Mods, feel free to move this thread to the "free software" subforum, as that's what this app is eventually going to be.
I've got the backend portion of the app (ie the part that does all of the calculations) up and running, and I'm waiting on my other developer to finish the frontend piece. He's working on the mobile app first, and the web app will come afterwards. We both have full-time jobs, so it may take a few months for us to have a finished product.
For those who want to test our minimal viable product, you can do so through our Discord bot. The bot sends raw queries to the FlopStats API on the backend and displays the results as text. Not exactly super user-friendly, but it gives you a simple way to try out different commands and see what the API returns.
Please visit
https://www.flopstats.com/ for instructions on how to access the discord bot.
I encourage you to use this thread to offer up any suggested changes to the underlying functionality of the app or suggest new features. Right now the features are pretty minimal. You can see how ranges hit a specific flop or on all flops as a whole, but that's it. I intend to add whatever the features the community agrees are most useful.