Zspacesystems can help you integrate and create Google web app for your website in additional to generating an extension for your site and deploy your app to Google web store.The Google Chrome web apps are basically websites.They run within chrome's browser,and they may not even require any downloads.Sometimes they may need to install a small component on your local machine, but that will make a difference where you're using that particular web app.An extension on the other hand, affects something global on your browser.