The original version of SKWebDevelopment.com had a Slashdot RSS feed on the home page and before I replaced it with this website I thought I'd add that functionality back again but this time you can enter any RSS feed you like.
Because many RSS feeds do not enable Cross Origin Resource Sharing (CORS) the feeds are fetched by a PHP script that runs on the webserver. This script could be used as an open proxy, so to mimimise abuse the response must validate as XML. For those who want to prevent this risk entirely it's recommended that the URL is compared against a whitelist of allowed RSS feeds which means disabling the 'any URL' option.
Another worthy addition to this, especially for high volume websites, would be caching of the feed data.
Download: rss-feed-reader-files.tar.gz (3.5KB)