AskTog discusses several Mac OS X third-party apps that help make OS X all he thinks it should be— which is, apparently, Mac OS 9. DragThing, naturally, is his favorite.
AskTog hates the dock, and I can't help but sympathize. My first week as a Mac owner, I had already found myself opening the Applications folder to launch apps. (Again, DragThing is an excellent solution.)
DT developer James Thomson (+/- p) intimated to me as OSX launched (without violating NDA, believe me) that he may have had input on the Dock in some capacity.
I've come to wish I could merge the Dock with DT, or invoke multiple instances of the dock. I wonder if a reskinning if DT as the Dock (TD?) might scratch my itch?