dainius.kaupaitis

When navigating on pages widget shows links to child pages. If there are no child pages – widget shows „brother“ pages. 
Link of currently viewed page can be styled through CSS. Widget shows nothing if user is browsing Posts (not Pages). 
Admin can configure:
<ul>
<li>widget title</li>
<li>which pages must be excluded</li>
</ul>
Widget can be localized.

DKA Child pages widget

Micha? Ochman

<a href="http://blog.scur.pl/wordpress-post-link-shortcode/" rel="nofollow ugc">Post link shortcode</a> is a WordPress plugin that adds a possiblity to link to posts and pages within your post or page content using a custom shortcode.
For more information, check out <a href="http://blog.scur.pl/wordpress-post-link-shortcode/" rel="nofollow ugc">Post link shortcode</a>.
Features include:
<ul>
<li>Usage as simple as using [post] in your post/page content</li>
<li>Customising the output by specifying anchor title, text and custom CSS classes</li>
</ul>

Post link shortcode

Link to posts and pages from your content using a simple shortcode.

DKA Child pages widget vs Post link shortcode