FeedRoller

It is a lightweight RSS feed ticker.
It is designed to show scrolling headlines from your favorite news sites and blogs, directly on your desktop.

As features:
- Supports RSS, and Atom feed format.
- Shows news title, summary, age and source.
- Customizable interface.
- May be "pinned" to the desktop (always visible) or automatically hide when the computer is in use.
- May be set to automatically hide when in full screen applications (games, movies etc.)
-Customizable keyboard shortcuts to pause the scrolling, pin the ticker, visit the news item and more.
-Can import and export feeds from other feed readers (using OPML).
-Supports subscribing to feeds directly from Firefox.
- Portable.