One of the best free apps there is.

Ive been using TextWrangler for years. I think the companys plan is to give this away and youll want to buy BBEdit, the step-up editor from TextWrangler. Frankly, TextWrangler is so capable, I have never made the leap. This program is rock solid, including its built in FTP client. Everytime I try a "fancier" way of developing, I end up back at TextWrangler. It has saved me so many times with its ability to use regular expressions to search and replace something in a huge folder of files. Overall, this program has held a prominent place on my dock for years -- and thats truly saying something!

RGustafson about TextWrangler, v3.5.2