15 Seconds on Air
Neat campaign this where users can record and submit 15 second radio jingles via this One Page website. All submissions are played on radio station ROX FM, no matter which genre or skill level.
This website has unfortunately redesigned or gone offline, so I have removed the link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this link on the Archive.org website. FYI: the site was first featured on 22 October 2013.