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A simple interface allows to create, publish and manage interactive timelines based in arbitrary contents, not in the publications of your blog. 
The most part of available commands in Simile Timeline Widget can be defined via wp-admin > Posts > Timelines, no code needed.
Trough the administrative interface, you can:
<ul>
<li>Create unlimited timelines</li>
<li>Add how many tracks you want</li>
<li>Edit existent tracks</li>
<li>Add hot zones to the tracks, individually</li>
<li>Edit existent hot zones</li>
<li>Add decorators to (all) tracks</li>
<li>Edit existent decorators</li>
<li>Add events</li>
<li>Edit existent events</li>
<li>Publish timeline via shortcode</li>
</ul>
<h3>License</h3>
Timelines was released under the terms of the GNU General Public License <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

Timelines

Allows to create and publish timelines in your blog using Simile Timeline Widget [http://www.simile-widgets.org/timeline/].

freshlabs

This plugin integrates the <a href="http://www.simile-widgets.org/timeline/" title="SIMILE Timeline at SIMILE Labs" rel="nofollow ugc">SIMILE Timeline</a> into WordPress and provides an option interface for the various timeline settings. 
Developed by SIMILE Labs, the Timeline is a web widget for visualizing temporal data.
Features:
<ul>
<li>Include individual categories to be displayed in the timeline</li>
<li>Build a lifestream timeline with RSS feeds from your WordPress link archive</li>
<li>Customize colors for timeline bands and categories</li>
<li>Supports multiple instances on different pages by using a template tag</li>
<li>Display individual icons or images with custom fields</li>
<li>Display image attachments from posts in the timeline</li>
<li>Comes with English, German, Italian and Spanish language files</li>
</ul>
Thanks to:
<ul>
<li><a href="http://simile.mit.edu" rel="nofollow ugc">SIMILE Project</a> for providing the Timeline script API and releasing useful, semantic applications.</li>
<li><a href="http://phplens.com/phpeverywhere/adodb_date_library" rel="nofollow ugc">John Lim of PHP Everywhere</a> for creating the ADOdb Date Library, making date formatting with dates before 1970 a charm.</li>
<li>Gianni Diurno for the Italian translations.</li>
<li><a href="http://pc.de" rel="nofollow ugc">Marcis G.</a> for the Belorussian translation</li>
</ul>

WP SIMILE Timeline

Integrates the SIMILE Timeline into WordPress and provides an option interface for the various timeline settings.

Timelines vs WP SIMILE Timeline