TimelineJS is an open-source tool that enables anyone to build visually,rich, interactive timelines. Beginners can create a timeline using nothing more than a Google spreadsheet. Experts can use their JSON skills to create custom installations, while keeping TimelineJS’s core look and functionality.
Chronoline.js is a library for making a chronology timeline out of events on a horizontal timescale. From a list of dates and events, it can generate a graphical representation of schedules, historical events, deadlines, and more. It requires raphael.js to function.
The library is designed to be easy to use, to handle large amounts of dynamic data, and to enable manipulation of and interaction with the data. The library consists of the components DataSet, Timeline, Network, Graph2d and Graph3d.
The SIMILE project of MIT develops open source tools to process and visualize all kinds of digital data. One of their widgets you can integrate in your own website and/or pair with other applications.