TreeDoc
"Why not read a document in its native form, as a tree? Directory trees, for example, are best viewed and navigated with "tree controls" (like the Windows Explorer): you see a vertical list of top-level directories, and opening one inserts its contents below and indented. Items there can themselves be clicked to open their contents in place, and so on all the way down, without ever hiding the top-level stuff you started with. Everything appears in place, and nothing gets erased." Ooooooooooooh. This looks exciting and, more importantly, brain-dead easy to use.
Paul Krugman
"By contrast, if several companies were given the right to sell Windows, their competition would probably drive the price of the operating system almost to nothing; this would amount to an expropriation of intellectual property rights. Maybe you think that Microsoft deserves that fate; but it is not a precedent to set lightly."