GameFlow is a plugin/extension for the Unity3D game engine. It simplifies and accelerate the development of video games. It reduces the barrier for game designers and artists compared with traditional scripting or programming.
One of the key workflow improvements of GameFlow is a dramatic reduction in the amount of time spent working in an external editor such as Visual Studio Code or MonoDevelop.
Simply drop a tested, well-defined component on your GameObjects, configure them in the Inspector, and hit Play - no need to constantly bounce between Unity and your IDE just to add routine functionality.
For experienced developers, GameFlow is designed for reuse and extension. The GameFlow extensibility API allows advanced users to create their own GameFlow blocks. While GameFlow will work with your existing code, the API allows for a more seamless, visual integration.
There are several different versions of "visual scripting" tools available on the market today. Many of those tools simply replace text editing with a verbose and cluttered visual editor.
If you are an experienced developer, you'll find that you need to write far fewer scripts from scratch, and can instead use GameFlow to handle the vast majority of typical tasks.