PHP RSS Parser

Magpie RSS: " provides an XML-based (expat) RSS parser in PHP.
MagpieRSS is compatible with RSS 0.9 through RSS 1.0. Also parses RSS 1.0's modules, RSS 2.0, and Atom. (with a few exceptions)"

160+ RSS Tools

Tips, Resources and More
"How to Create RSS Feeds with Dreamweaver How to Create an RSS 2.0 Feed How to Create an RSS Feed with Notepad, a Web Server, and a Beer How to Create an RSS Feed from any Web Page Set Up a Simple Syndication Feed Using RSS ..."

gAjax RSS Feeds Displayer

Dynamic Drive DHTML Scripts: "This script is the fastest way to display RSS feeds from other sites on your own, period. It uses Google's Ajax Feed API to host the desired RSS feeds on Google's servers, so all that's left for you is to insert some code on your page to show them. Using gAjax RSS Feeds Displayer, you can display results from multiple feeds intermixed, sort them in a variety of ways, specify which components of each RSS entry to display, and more. No more hurdles in your way to showing RSS feeds on your site!"