ZO219 A-Dock is still available, still right here ... and still has an amazing number of tweaks to the dock and its behavior that Apple should have included by now.
DANA SUTTON Great app., there are several that more or less do the same thing, but SuperDocker is clearly the best. I'd suggest one change. The worst feature of the Dock is its "hair trigger" behavior when it is hidden: you just have to graze the edge of your screen for a millisecond with your cursor and up it comes. I accidentally do this dozens of times a day, a real annoyance. I remember the old application A-Dock which required the cursor to be in contact with the screen edge for a minimum amount of time (defined by the user) before the dock would come up. I sure wish a third-party application like SuperDocker would include a modification feature that would make Apple's dock behave the same way. Could this be added to a future version, please? (Version 2.4)
ACCOUNTCLOSED A solid and versatile dock utility with a beautiful, clean interface, and it's donation-ware no less. Michael is impressively responsive and serious about developing this app quickly and thoroughly. The new "Clear" option (v.2.2.2) is gorgeous—a great answer to the 2D vs. 3D question. Try this sweet little app, and if you like it as much as I do, be a sport and send a donation (calculated in Euros). The developer is earning it! Highest recommendation. (Version 2.2.2)