RSS Reader Newsfeed seems to be the right choice in case you are looking for a simple-to-use application that lets you read feeds and check for new posts.
Simply drag-drop the RSS/XML icon from any website to this application, the feed will be automatically added. Alternatively, you can enter a URL or local file into the edit box and press ‘add url’.
If a new post is found, a small window appears and shows you the title of the new post