Greatest desktop app of all time

My pick for the greatest desktop application of all time is MORE.

Not only for what it does—it’s an outliner—but for its user interface. It feels so right and good.

When I’m working on user interface it’s the je-ne-sais-quoi of MORE I aspire to. Getting that light, fast, and so right feeling is the goal.

What’s your pick for greatest desktop app of all time?