ThemeForest - Flat Surface - Responsive 404 Error HTML5 Template - RIP | 36,5 MB
Premium, stylish and responsive 404 error template with amazing background animation. This can be used for companies that are error page or page not found online with their bussines or any other site.
DEMO:
http://themeforest.net/item/flat-surface-responsive-404-error-html5-template/5552500