Responsive Tester is a One Page App, Digital Product, Landing Page, website.
This website has unfortunately been redesigned or gone offline, so I have removed the direct link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this Archive.org link. FYI: the site was first featured on 15 January 2013.
Features Black Color Dark Color Scheme Minimal
Category App, Digital Product, Landing Page,
Published 15 Jan 2013