Stylizer - A productivity-focused real-time CSS editor for serious web developers. Mac OS X and Windows.
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
Topstyle - TopStyle contains powerful tools for building standards-compliant web sites.
TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.
EnjoyCSS - CSS generator for rich graphical styles without coding
iNotepad - Write and organize all your texts and notes on Mac.