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.

Sources

It can pull in media from a variety of sources and has built-in support for: Twitter, Flickr, Google Maps, YouTube, Vimeo, Vine, Dailymotion, Wikipedia, SoundCloud and more media types are added regularly.

Tips & tricks

1. Keep it short, and write each event as a part of a larger narrative.
2. Pick stories that have a strong chronological narrative. It does not work well for stories that need to jump around in the timeline.
3. Include events that build up to major occurrences.Not just the major events.