GoboLinux is a modular Linux distribution: it organizes the programs in your system in a new, logical way. Instead of having parts of a program thrown at
/usr/bin, other parts at
/etcand yet more parts thrown at
each program gets its own directory tree, keeping them all neatly separated and allowing you to see everything that’s installed in the system and which files belong to which programs in a simple and obvious way.
Off-topic, I know, but this strikes me as an eminently sensible approach.
Sounds like what OS X does with applications. Very sensible.