I realize you're asking for a list of sites with RSS feeds, but I wanted to highlight an easier method of sometimes finding feeds than that mentioned by Evkob: Feedbro add-on for Firefox.
You can click the icon for it while browsing a site to check for whether or not any feeds are available. Unfortunately it doesn't always find them, I think depending on the part of the site you're browsing or how the feed is being provided, perhaps both, but it's been a pretty useful tool in my experience, especially for sites that seem determined to bury them.