"With the other guys, whenever something doesn't work they all point fingers at each other -- it's the software, it's the hardware, it's the network. With us, we make the whole widget." Steve Jobs
"He has not designed a single project" is a bit of a strawman argument. What Jobs does is focus a team of designers and engineers on creating a product that is really satisfying to use. It doesn't sound like much, but if it's easy, how come no company but Apple seems to be able to do it?
Anyway here is a Mac application that applies some of Jef Raskin's ideas to a finder alternative: http://www.raskinformac.com/