RSSMore is a free rss screensaver that lets you subscribe to any number of RSS feeds and view them in your rss screen saver. You can also specify a folder (including its sub folders) to provide background images.
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RockMelt Alternatives
RockMelt is described as 'Rockmelt is fast and fun way to discover and share the best of the web' and is a popular RSS Reader in the news & books category. There are more than 50 alternatives to RockMelt for a variety of platforms, including Web-based, Windows, iPad, Mac and iPhone apps. The best RockMelt alternative is Feedly, which is free. Other great apps like RockMelt are Inoreader, RSS Guard, Flipboard and Feedbro.