Contacts PlusContacts Plus is free for the next 24-hours.  For free, it’s a great deal. :) It is the perfect replacement for the built-in contact app.  Not only does it show contact photo, number, and address in the index listing, but it allows you to group your contacts and alerts you to your contacts birthdays.  Tapping on a selection will offer you the opportunity to call them, email them, or SMS them.

Contacts Plus is normally $1.99 in the app store.  It adds a lot of additional functionality that really should have been included in the iPhone OS.  You can fix that oversight for free though if you hurry.