PowieT

This widget plugin will display a list of posts or pages.
<ul>
<li>Displays posts/pages.</li>
<li>Change sort order.</li>
<li>Display/hide created or updated date.</li>
<li>Include / exclude IDs</li>
</ul>

Powie's Page Cloud Widget

This widget plugin will display a list of posts or pages.

GraphicEdit

End Page Slide Box is to have an element in the page when you hit the bottom of an article that triggers Slide Box to appear and displaying related article.
Links: <a href="http://graphicedit.com/" rel="nofollow ugc">Author Homepage</a>

End Page Slide Box

End Page Slide Box is to have an element in the page last paragraph that triggers End Page Slide Box to appear.

Powie's Page Cloud Widget vs End Page Slide Box