Newsreader

Provides intents
Provides intent actions: 
Provides intent URIs: 
Uses intents of other applications
Uses intent actions: 
Uses intent URIs: 

OpenIntents Newsreader.

Detail page and screenshots: OpenIntents Newsreader.

The newsreader supports RSS and Atom feeds.
It calls an external web browser for viewing content, but also supports offline viewing through a web view.