I love Coda

A very cool and handy text coding mac app, with one-window web development. I've been doing web design on MS Frontpage on PC many years and last year i tried to started coding website with Textmate on Mac but i couldnt really use to it and i still switch back to frontpage sometimes, but since i tried Coda few months ago, i just started to love using it and it not just useful, it is really cool and handy. Its almost perfect.
It is winner of Best Mac OS X User Experience in Apple Design Awards 2007.
The only uncool thing is it cost $99 $79, but if you have Transmit 3 you can enter your Transmit 3 Serial Number to get discount $10 off, for $69. But its worth it.
If you are Mac user and Web Designer, you should try it now.
Panic - Coda - One-Window Web Development for Mac OS X