Notepad++ is one of the best I have ever used. At least of the free ones. I personally like Dreamweaver most (I guess, most of you do ;) ), because it's a really powerfull editing/creating tool. Sincerely, D. Berletta
At the basic level, I like to use NotePad++. It is very simply and user friendly. On a more technical level, I love using Adobe Dreamweaver. It has built in functions for working with PHP code. Example: Record Sets and Dynamic Database Connection. This helps to minimize about of hand coding I have to do.