Richard Venancio

This plugin used show a especific post, page or posts of one or any categories
Supose you have an area in your home with highlights, you can use this widgets to put the main posts, and don’t need to concern in copy text, links and other in de text-widget.

RVPagePosts

This plugin used show a especific post, page or posts of one or any categories

dmallon

The Post To Sidebar plugin makes it easy to display post content in the sidebar areas of your site. Once the widget is activated, a multi-select dropdown of all your published pages appears on post editing screens. Select the pages upon which you want the post to be displayed and the post will appear on those pages.
There are options to hide the post title in the output and to show the content as an excerpt.

Post To Sidebar

A WordPress plugin/widget that gives you the ability to put content (posts and custom post types) in your sidebar.

RVPagePosts vs Post To Sidebar