With MacOS X you can customize toolbars in the finder.
So why can't you customize your dock as well?
With Dock Separators you can group your applications simply by dragging a copy of your favorite separator into the dock. You may just as easily remove a separator by dragging it away from the dock.
We included several stylish separators: feel free to draw new ones and submit them to our email address: firstname.lastname@example.org
What's new in this version:
New horizontal separators for vertical docks; New "Dock Spacer"; Revised documentation; New separator stlyes.