I was looking at an online timeline development application from xTimelines but I couldn’t get the embedding feature to work on this site. A quick search for similar tools led me to my alma mater, of all places, where they had done a nice evaluation of alternative timeline applications.
Here’s a sample from Timerime:
I also liked the Timeglider application but I thought the navigation was a little less intuitive. One interesting facet of this tool is that the company has teemed up with the New York Times to create an online application that generates a timeline of headlines for any search string. This is a powerful concept that takes advantage of the NYT data API … something I’ll have to explore further.