Chrome App

https://developers.google.com/chrome/web-store/articles/launching
https://developers.google.com/chrome/web-store/articles/launching#pre-launch-checklist
https://developers.google.com/chrome/web-store/docs/publish

http://developer.chrome.com/extensions/apps.html
http://developer.chrome.com/trunk/extensions/apps/about_apps.html

Tutorial
http://ohboard.com/blog/chrome-web-app-development-guide/