Content Curation World

FeedShare is an excellent free online resource to find curated reading lists of RSS feeds on specific topics.

FeedShare is in fact an open-source web app which allows you to easily upload and share your OPML file with others (An OPML file is a collection of RSS feed URLs.)

FeedShare curates a short list of the most interesting and valuable OPML files in its Popular page, allows you to find relevant OPML files by tags, and makes it easy to search across all of its archives. 

Free to use.

Try it out now: http://feedshare.net/ 

Contribute your list: http://feedshare.net/share/ 

To learn more about OPML files: http://en.wikipedia.org/wiki/OPML 

Check also: OPML Support for Firefox 

Thanks to @cleverclogs