Your local offline Google Reader.
Feed Store is a very useful tool for those Google Reader fans who love to enjoy reading their feeds at anytime, anywhere, even when they’re offline. Staying silently right on your browser as a small toolbar icon, Feed Store check if there are new unread feeds and download them to local storage automatically. The icon also indicates how many unreads currently in your feed store.
What’s more, Feed Store is also a great powerful offline RSS reader. With respect to the google reader users, Feed Store provides an iTunes-like user interface and with almost the same hotkeys as Google Reader. User can also customize preferences and styles of their own.