I believe it's written with TWUI, the same as Twitter's official Mac client. I know that highlight behavior, custom drawn scroller, and scroll inertia in the sc

I believe it's written with TWUI, the same as Twitter's official Mac client. I know that highlight behavior, custom drawn scroller, and scroll inertia in the scroll view from anywhere. Probably the first big user out side of Twitter to use it publicly. I bet it made porting the iOS code over easy with all the Core Animation the iOS version uses. Edit: Nope. I was wrong. I see the nib files. It's AppKit. They just use a hell of a lot of Core Animation.