Cost | Mode | Commercial Account | Collaboration | Supported Media | Export to Print |
Free | Web/Cloud based, data is stored in a Google spreadsheet. Resulting timeline can be shared via link or as embedded media in another page. | Requires Google Account | Yes, multiple authors can access and edit spreadsheet based upon Google sharing permissions.
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Images, sounds, videos, maps, and more. Media must eb hosted elsewhere and added via URL or code for iFrame embedding. | No |
The Timeline JS site provides a good walk through of setting up a new timeline but I have created some additional guides to help you get started working with tool.