Catnip is an RSS web app with two main differentiators: - it's an RSS 'aggregator', not a reader mode. I believe the browser itself is the optimal reader. Every RSS app has a bespoke reader mode that tends to suck in comparison to the browser itself. - it has a frontpage that's an aggregate of some popular feeds, making it useful without an account. I plan on adding some boosting of popular feeds once I have users.