RSS Feed Search Engine. Nice little search engine, based on Google. Just type in your area of interest and it will give you back 10 popular feeds. Results give you title, summary, web and RSS links, and you can see the feed before subscribing to it. Fast and easy. Sice it's using the Google API you can search by subject, find the feeds offered by a publisher, search for all feeds on a subject from a single website, and more.
Downside is that 10 results is your lot, and it's very heavily US biased.
They offer three kinds of feeds, so you can add an RSS feed to literally anything you find online. All of their services are FREE, and no ads will appear on any of your feeds. You can set a feed within seconds.
Link: Ponyfish RSS Feed Builder is a FREE web-based tool that allows you to create your own RSS feeds from almost any web page.
All you have to do is simply point Ponyfish to the web page you want to create a feed from, then follow a few steps to setup which types of links you want to include in the feed.
Link: MultiRSS :: Multiple RSS Feed Readers, One Solution..
MultiRSS is a free service that allows you to replace all of your RSS feed subscription
buttons on your blog with one button. After you have replaced your buttons,
your users will click on our button and then be able to choose the RSS reader
that they use from our current list of the 38 most used RSS readers.