The British Library's Turning the Pages site

"Turning the Pages is the award-winning interactive program that allows museums and libraries to give members of the public access to precious books while keeping the originals safely under glass. Initially developed by and for the British Library, it is now available as a service for institutions and private collectors around the world.

Turning the Pages allows visitors to virtually 'turn' the pages of manuscripts in a realistic way, using touch-screen technology and interactive animation. They can zoom in on the high- quality digitised images and read or listen to notes explaining the beauty and significance of each page. There are other features specific to the individual manuscripts. In a Leonardo da Vinci notebook, for example, a button turns the text round so visitors can read his famous 'mirror' handwriting."