Hi folks! I'm in the process of conceptualizing a new graphics program and I'm looking for ideas and inspiration in user interface design. I would love to see your favorite examples of excellent, well designed, intuitive, even "clever" User Interfaces in applications (not websites). Aesthetics matter too, but I'm mostly interested in functional design.
It would be especially helpful to see examples of applications with complex functionality that is exposed through an intuitive UI. 3D programs, music programs, etc. Creative applications, content creation, that kind of thing.
Ideally examples would be from desktop applications, but mobile apps (phone/tablet) are useful tool. Basically any UI that has ever made you go "wow, I wouldn't have thought of that" or use words like "inspired", "ingenious", or "slick" to describe it. The kind of UIs that are immediately intuitive and easy to use, appealing to look at, and a pleasure to interact with. With everything where it "should" be and no actions taking more steps than seem necessary.
Examples of UIs with some nice ideas and "touches", but that are not necessarily a cohesively awesome UI all around also helpful. But I'm really looking for excellent all-around design examples.