EditPlus was the text editor that I used on Windows and unfortunately I still have not been able to find the penultimate equivalent on a Mac - I have tried BBedit, Hyperedit, Textmate, SubEthaEdit, Jedit etc etc and not one of them lived up to standards - It could be because I was just too impatient and should go back and give some of them another try.
Textmate and Hyperedit for a start could not handle Japanese text - they could open files with Japanese text but you could not type (well you could type but nothing would happen).
Smultron is what I have been using of late - simple but far from perfect. Also handles Japanese, Chinese and Korean correctly.
