Open Terminal Here, Open in TextMate and ISelect for Leopard
I like to go back and forth between the Finder, Terminal, and TextMate. Also, I miss the ability to select a group of items in a Finder window by some criterium. Today, I installed the Open Terminal Here, Open in TextMate, and Iselect apps into the Finder to let me do just those things. Check 'em out, they cool!
(By the way, to install Iselect, open it up in Script Editor.app and save it as an Application Bundle and select Run Only as the only selected option. Drag the resulting app file to the Finder's toolbar.)