Scintilla

Written by Philip

Scintilla is an free library that provides text-editing functions, with an emphasis on advanced features for source code editing. SciTE (cross-platform), Notepad++ (Windows) and Notepad2 (Windows) are standalone editors based on Scintilla.

Homepage : http://www.scintilla.org/
Attribution: http://en.wikipedia.org/wiki/Scintilla_%28editing_component%29
License : Free