There are many free RSS readers for Windows Phone 7 including Feed Reader, RSS Central and RSSToGo. Flick Pro is another free RSS reader for WP7 which features an awesome interface and also is elegant, attractive and feature-packed. All news articles from your favorite sources are presented in a beautiful interface with thumbnails designed to provide a ‘glance and go’ reading experience.

Features;

• Choose from 85 pre-defined sources and add as many as you like!
• Add custom sources of your choice
• Get news based on keywords of your choice
• Save articles for offline reading
• Get an attractive view of top stories for quick glancing
• Share articles via Twitter, Facebook, SMS or Email
• Automatic URL shortening when tweeting.
• Customizable display options for personalized reading
• Significant performance boost, smooth scrolling and other improvements

Flick Pro is a nice RSS reader for Windows Phone 7 and worth trying.