I've had this open in one of my tabs for weeks, and just haven't made the time to play with it further, but it's definitely worth checking out - so go do it!
The Wellcome Library ("We are one of the world's major resources for the study of medical history. We also offer a growing collection of material relating to contemporary medicine and biomedical science in society.") has made a wonderful tool, their 'digital asset player' and interactive timeline, available as Open Source.
What does it feel like to interact with a digital version of a book? How can we replicate the experience of working with physical collections – on the web? What features will enhance a researcher’s experience of using digital collections? What if we could build tools with Wellcome Library in mind, but make any software we develop available to other libraries under an open source licence?
We asked these big questions, along with innumerable others, during the development of the Wellcome Library’s ‘digital asset player’ and interactive timeline.
Check out this timeline example: