illuminatus7

An easy to use Recent Posts Plugin. This plugin will allow you to display the recent posts in a sidebar only on a category page.
New Features Added
<ul>
<li>Specify the number of posts to display in the sidebar</li>
<li>Show/ hide excerpt</li>
<li>Specify the number of words to be displayed in the excerpt</li>
<li>Option to specify custom Read More text</li>
<li>The Read More text is also a link to the posts permalink</li>
</ul>

Categories Recent Posts Widget

This widget displays the recent posts on a category page for that category

De paragon

‘Recent Archive More Widget’ displays posts, not listed on page content area on the widget area of the sidebar of category archive page. If a post (within the current category archive page) is displayed on the content area of the page, this plugin will exclude it from the list of posts to be displayed in the widget area of the sidebar. Recent archive more widget displays more posts of the current category on the sidebar. 
 Features 
* Recent Archive More Widget is intelligent enough to know when it is on a category page. I.E if this widget is added on the sidebar it will remain silent (not appear) unless the page currently viewed is category archive page. 
* There is no need to configure the titles and archives, Recent Archive More widget knows what to do. 
* Two Configuration options: Widget title (I recommend you leave the title blank) and Number of post to display default is 3 posts (you can change this). 
* Displays post thumbnail and title nicely on the sidebar.

Recent Archive More Widget

'Recent Archive More Widget' displays posts, not listed on page content area on the widget area of the sidebar of category archive page.

Categories Recent Posts Widget vs Recent Archive More Widget