I just tried notepad++ and it looked quite good, until I loaded one of my HTML pages in UTF-8 and the part in Korean is not rendered correctly. What do I need to do to make it work? It works with other editors flawlessly.
Check menu "Format->UTF-8 without BOM" will do it.
Next version (v3.4) of Notepad++ will support auto-detection of UTF-8 without BOM.