User Inter Faces
What a useful little One Pager that provides faces for helping design your app. Love how the faces are random on load and also how friendly the sliders are. Good resource!
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 27 March 2013.