What's your favorite multi - editor on OS X?
BBEdit's latest release is REALLY good. I first encountered BB way back in the day on OS7, and it was more editor than I needed at the time, and it only confused me. Since then I've become a much heavier-duty text editor user, and when they brought out a new release a couple months ago I pulled the trigger.

It's EXCELLENT. Every feature I've wanted, it's had for me, waiting to discover. Can't recommend it highly enough. You can find it on the App Store.