Dor Zuberi

The “Right Now” Extended Plugin allows you to decide which statistics to show on your “Right Now” dashboard widget on the control panel. 
You may choose the statistics you want from the following list:
<ul>
<li>Posts</li>
<li>Pages</li>
<li>Categories</li>
<li>Tags</li>
<li>Comments</li>
<li>Links</li>
<li>Users</li>
<li>Media</li>
</ul>
For further information, please visit the official plugin site: <a href="http://www.zuberi.me/2011/right-now-extended-plugin-for-wordpress.html" title="Official site" rel="nofollow ugc">“Right Now” Extended Plugin (for WordPress) | Three Dots</a>.

"Right Now" Extended

The “Right Now” Extended Plugin allows you to decide which statistics to show on your “Right Now” dashboard widget on the control panel.

Chris A. a11n

This plugin requires PHP 5.3 or later, please check with your web host if you’re unsure.
Adoption uses the timezone that is set in the WordPres admin panel. Ensure you have set your local timezone in Settings > General.
Features:
<ul>
<li>Displays a bar chart with registration statistics for predetermined time periods (e.g. this week, last week, last 3 months, last 12 months, etc.)</li>
<li>Displays a “Quick Statistics” section which includes a summary of user registrations for popular time periods.</li>
<li>Easy to use, tidy and fits in with the overall WordPress user interface.</li>
</ul>

Adoption

Adoption displays user registration statistics in a neat dashboard widget

"Right Now" Extended vs Adoption