Greg Ross

Adds a JavaScript calendar to the scheduled publish widget to allow you to select a date and time graphically instead of via the text entry boxes.
This plugin uses the gpl’d dhtmlxcalendar (http://dhtmlx.com/docs/products/dhtmlxCalendar/index.shtml) for the calendar control.
This code is released under the GPL v2, see license.txt for details.
<h3>Roadmap</h3>
<ul>
<li>None at this time.</li>
</ul>

Schedule Posts Calendar

Adds a JavaScript calendar to the scheduled publish widget to allow you to select a date and time graphically instead of via the text entry boxes.

Ron Zvagelsky

Monthly grid view calendar widget highlighting archived and/or future posts.
Additional Features:
<ul>
<li>Popup details for each date with posts</li>
<li>Optional details include post author and comment count.</li>
<li>Ability to show posts by post type, category, specific taxonomy and/or term</li>
</ul>
<a href="http://presshive.com/plugins/wordpress-blog-post-calendar-plugin" rel="nofollow ugc">For more information or to request additional features, please visit the plugin page</a>

Blog Post Calendar Widget

The Blog Posts Calendar Widget allows you to display your archived or future posts in a calendar as a sidebar widget.

Schedule Posts Calendar vs Blog Post Calendar Widget