Slim Text Editor
Slim Text is a slim text editor which runs inside Chrome browser. It supports Windows, Linux and Mac OS X.
Official website: http://slimtext.org
Issue: "This application is not supported on this computer. Installation has been disabled"
Run chrome in Windows 7 compatible mode can fix this issue:
It is said that after installation you can disable compatibility mode and Slim Text will still work.
Here is the link to Slim Text on Chrome Web Store.
If you like it, don't forget to give it a 5-star rating ^_^.