TotalFinder brings tabs to Mac OS X!
Aside from adding tabs, TotalFinder also has a few other neat tweaks. It can optionally clean up all those .ds_store files floating around your hard drive, and it can also show/hide invisible files. The coolest extra feature is a system-wide, customizable keyboard shortcut to pop up a new Finder window. Keyboard-only junkies who recoil at the thought of clicking the Finder dock icon to get a new window will love it. This feature is based on one of the developer's other projects, Visor, which offers system-wide Terminal access.