Paragon Machine works track ends with derailleur hanger on DS and bottle opener on NDS. Nice, relieved and can get them in Steel or Titanium (maybe aluminum?) and pretty cheap.

I'm also partial to ends with removable clamping faces like those found on the Pista Concept. A real sharp way to keep your paint from getting dinged.

Water jets are cute and all, but unless you need a real tight radius, I don't see the point. And like others have said, they're not so great on 1/4" thick steel.