Sublime Text 3. Great code editor.

Download from here:
http://www.sublimetext.com/3

View/Edit code:
1. Just drag and drop file to the Sublime icon. And sublime will open it.

To Install package:
1. Install Package Control, go to:
https://packagecontrol.io/installation
2. Copy code, now open 'Sublime' go to 'View' -> 'Show Console', paste code and enter. Done.
3. Cmd+ Shift + P , type "Install Package"
4. For ex: Dayle Rees (to add color schemes)

Some cool packages to install:
-predwan (nicer tabs)
-Dayle Rees (color scheme)
-Brackethighlighter (highlights brackets)
-SideBarEnhancement (more sideBar options)
-sublimecodeIntel (code completion)
more.....

To Remove package:
1. Cmd+ Shift + P , type "Remove Package"
2. Select package to remove



Reference:
https://www.youtube.com/watch?v=zVLJfrIwEP8

You can google and find different plugins for Sublime. I highly recommended :)