DuncanMarshall

This widget displays the current star sign, your zodiac sign, or a calculator to let users pick their’s.
<ul>
<li>Clean, simple, and responsive design fits well with any theme</li>
<li>Keeps users coming back to your site.</li>
<li>Works equally well on desktop or mobile.</li>
</ul>
The widget renders html anchors to static alternatives for users with NoScript, but requires you to enable this feature.

Show Star Sign Widget

A sidebar widget to display a star sign - yours, or the current sign.

utdemir

With this plugin, you will get two links; One link for the image, and one link for the redirect page. Then you can use these links in a forum signature like this:
[url=example.com/wp-content/plugins/p2i/1.php][img]example.com/wp-content/plugins/p2i/1.png[/img][/url]
It also supports shortening the url’s with “is.gd”.

WP-Posts to Image Plugin

Let's you show your blog's last posts on a forum signature or stg. uses bbcode.

Show Star Sign Widget vs WP-Posts to Image Plugin