One Pager promoting ‘Essential Icons’ – a freebie by German Art Director, Daniel Swoboda. The 100% free iconset contains an essential set of icons you need for UI building. Lovely touch with the icon load transitions.
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 17 August 2014.