"Flowmeo" -- my game design planning tool -- is "feature complete", so go check it out!
live demo: https://luvcraft.github.io/flowmeo/
It's a tool that runs in a webpage that you can use to quickly make one-way flowcharts, like you might need for designing an adventure game, or a tech tree, or a skill tree. And you can easily add and remove items from flows.
Here's a video overview:
So! Please check it out and let me know what you think!
Maybe this is the game design tool you never knew you needed! Or maybe it's a perfect tool for some other project you have that has nothing to do with game dev!