Some space geeks are calling today “The Day the Earth Smiled,” because the Cassini probe is set to take a picture of our planet as seen from Saturn later this afternoon. To honor this momentous occasion, the maker of astronomy software SkySafari is giving away basic versions for iOS and OS X (and discounting the Android version) through Sunday.

Deals — that’s what we want. No doubt about it. Combine our love of cuisine with our zeal for deals and a website like BiteHunter becomes a well-worn destination. And now, they’ve got an iPhone app.