The famous editor Notepad++ is available in version 6.4.3. And this is an Open Source dev tool that is available for free. Download it from the links below

Download Notepad++ 6.4.3

Release Date: 2013-07-28

• 
  Notepad++ Installer : Take this one if you have no idea which one you should take.
• Notepad++ zip package : Don't want to use installer? Check this one (zip format).
• Notepad++ 7z package : Don't want to use installer? 7z format.
• Notepad++ minimalist package : No theme, no plugin, no updater, quick download and play directly. 7z format.
• SHA-1 digests for binary packages : Check it if you're paranoid.
• Notepad++ source code : The source code of current version.

Notepad++ v6.4.3 new features and bug fixes:

1. Fix a crash issue while using Function list.
2. Enhance delimiter selection (Ctrl + Mouse Double Click) – add GUI settings in Preferences dialog.
3. Add open session in the new instance capacity.
4. Add new command line argument “-openSession” for opening a session file.
5. Add multi-instance option.
6. Fix regression -systemtray command line option not working properly.
7. Fix start/end selection bug after the text modification between the start and end position.
8. Add localization command line option -LlangCode where langCode is browser language code.