Notepad++ is a free source code editor and Notepad replacement
It supports several programming languages, running under the MS Windows environment.
This project, based on the Scintilla edit component (a very powerful editor component), written in C++ with pure win32 api and STL (that ensures the higher execution speed and smaller size of the program), is under the GPL Licence.
C C++ Java C# XML HTML
PHP CSS makefile ASCII art (.nfo) doxygen ini file
RC resource file Pascal Perl Python Lua TeX
TCL Assembler Ruby Lisp Scheme Properties
Diff Smalltalk Postscript VHDL Ada Caml
AutoIt KiXtart Matlab Verilog Haskell InnoSetup