Visual scripting is a great way for technically inclined non-programmers to articulate their ideas to a computer program. The abstract concepts of looping and visualizing decisions can be applied to a lot of different areas.
In game development in particular, visual scripting languages like Unreal's Kismet can be used to direct gameplay logic. Example:
http://en.wikipedia.org/wiki/File%3AKismet%5FRoboblitz.PNG
Are there any libraries or toolkits out there that I could link against to provide a visual scripting tool to (technically inclined) end users?