KidsEatFor is a search service that finds restaurants where kids eat for free or other specials for kids based on location. KidsEatFor has both a website and a mobile application for Android and iPhone.
The KidsEatFor API allows developers to integrate the search results and deals found on KidsEatFor in other websites. The API allows for retrieving information based on a variety of criteria, including location, deals, menus, chains, and reviews.
MyBantu is an interesting little mashup, available as an iPhone app, an Android app, and a website. Its goal is to make shopping for anything, especially restaurants and movies, easier and more social. It uses Yelp API, Netflix API and various others to make it happen. It's very similar in idea to Siri, the "ultimate mashup" that Apple later gobbled up in the largest mashup acquisition ever.