Need 'pie' mouse menu, forget what it's called
 

I recall compiling a program for X that would display a pie-like menu when you'd hit the middle mouse button. I think it was a KDE app, but I'm not sure.

The problem is, I'd like to find it, but I can't remember what the name is, and I can't seem to find the thing.

I think it started with a "K" but I'm not sure. Any help on this one?

I don't know about in KDE but in Firefox there is an extension that does just that for web browsing. I believe it is called EasyGestures or something like that. It is in the Navigation category of extensions.