I have been using Apple's TextEdit, and I love it. It has been so great compared to the fat and cumbersome Microsoft Word that I had been using on my PC.
Well, now I am here to evangelize about a new product that I am using TextWrangler by Bare Bones Software. Wow, this is the best text editor that I have ever used. If you are using a Mac do not wait, download this FREE TextEditor now. If you are not using a Mac, then you are out of luck, this is for OS X only.