There are times when you’d like to have a certain type of post appear in a widget for use in your sidebar or if your theme supported it, your header or footer. Random One Cat Widget allows you to do this. It will display any post, long or short, even ones containing pictures and custom fields, although it is best suited to small text posts.
On this site I use it to display a category of posts I called tips in the footer. These are normally just one liners that I sometimes add to the site, but it will work equally well for any group of reasonably small posts.
Details & Download
You can find more detail and download this Widget from the WordPress Plugin Directory.