Notepad2-mod 

Notepad2-mod is a fast and light-weight Notepad-like text editor with syntax highlighting. This program can be run out of the box without installation, and does not touch your system's registry. Syntax highlighting support for AutoHotkey, AutoIt3, AviSynth, Bash, CMake, Inno Setup, LaTeX, Lua, NSIS, Ruby and Tcl scripts. Support for replacing Windows Notepad using a clean, unintrusive registry-based method .