Marco Brughi

This plugin create a widget to set the reading of RSS. It works with both RSS and XML. There are a few parameters to set up: Title = The title to display in your blog, RSS Feed = The URL of your selected RSS (work both rss or xml feed), Item to display = how many item display (from 1 to 5), show date = y/n, show summary = y/n.

RSS Advanced Widget

Create a widget to set the reading of RSS. It works with both RSS and XML. Easy to install and set up, just enter the URL of the desired RSS.

mdjekic

Are you using the WP default RSS widget to display a feed on your personal page 
or blog? Did the damn thing cache a feed (or several feeds) and refreshing the 
page and browser cache doesn’t work? Here is the solution…
Visit the <a href="http://milos.djekic.net" rel="nofollow ugc">author’s blog</a> to stay in touch and don’t 
miss <a href="wordpress.org/extend/plugins/synchi/" rel="nofollow ugc">Synchi plugin</a> – a full IDE inside 
your WordPress.
Install this simple plugin and run the Clear RSS Cache action from your Apperance 
menu whenever you want to fix this most anoying issue on your blog. Enjoy!

WP Clear RSS Cache

A simple WP action to clear the RSS widget cashe.

RSS Advanced Widget vs WP Clear RSS Cache