The mobile ringtone gift programme, called Gringtones, has been set up by ChildLine to raise money for the charity's work and has so far created downloadable ringtone messages from Ant and Dec and Simon Cowell.
The Gringtones website, created by digital company DX3 and Bear Design, will aim to raise money to train volunteer counsellors to deal with the 4,500 children who call ChildLine daily. The Gringtones can be downloaded from the website for £3, with all profits going to charity.
ChildLine said a total of 20 media companies had given free adspace, creative input, planning and technology in order for Gringtones to be set up.
Among the media companies that have donated resources, including £600,000 of print and online adspace, are IPC, International Poster Management, Universal McCann, Trinity Mirror, CBS Outdoor and Ocean Outdoor.
Other companies that have contributed are GCap, Viacom Brand Solutions, MTV, Newbrandmedia, Primesight, Sounddelivery, Streettalk, Voxpops, Telegraph Online, Boomerang, Titan & In-Situ, Taxi Promotions UK, Walt Disney and Visit London.
Dan Gopal, deputy chairman of ChildLine 20 Board, said: "Everything has been provided free on behalf of ChildLine and only the charity profits from the sales."