Text editor

I'm getting tired of Notepad++ and its annoying and cumbersome interface. I'm looking for an editor with:
1.Syntax highlighting/+User-friendly way to edit highlights bonus
2.zero cost/+Open source  bonus
3.search and replace:in selection/+regex bonus
4.Multiple document interface/+tree view bonus
5.Code folding or equivalent./+Auto-completion of keywords/brackets/functions bonus
6.Ability for changing font/colors/appearance freely .
7.Ability to handle unicode and large >64kb files.
8.Extensive undo/redo /+bonus for keeping it after saving.
9.Macros or scriptable commands.

>>48
Nobody said you need to recover the whole applications source code. Of course it's possible to do it if you have the time, but, your goal was to just understand if something is a malware or virus, in which case, the task is much simpler than fully recovering the source code of a large application.