Dialvetica
Dialvetica is the best way to find contacts on your iPhone. It’s like the whole app has been built for a single purpose: get to a contact fast. Dialvetica’s custom interface is designed for this sole purpose, and so is the way it works under the hood. Searching for a contact within Dialvetica is far superior to searching within the Contacts pane of the iPhone’s Phone app. Just two bucks on the app store.