OfficeNotepad++ is a free source code editor (and Notepad replacement), which supports several programming languages, running under the MS Windows environment. It also gives the extra functionality to define a users own language for the syntax folding and syntax highlighting. You can print your source code in color. It allows a user to edit the different document in the same time, and even to edit the same document synchronizely in 2 different views. It supports full drag and drop.
The programming languages supported by Notepad++ are:
ASP, Ada, ASCII art, Assembly, AutoIt, BAT, C, C#, C++, Caml, CSS, doxygen, FORTRAN, HTML, Haskell, Java, JavaScript, KiXtart, Lisp, Lua, makefile, Matlab, Objective-C, Pascal, Perl, PHP, PostScript, Python, Ruby, Scheme, Unix Shell Script, Smalltalk, SQL, Tcl, TeX, Verilog, VHDL, VB/VBScript, XML

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. 

Download :

http://rapidshare.com/files/122193892/nodpp.4.9.2.Installer.rar