xContacts Free
Here we have another great app for the iPhone and this one takes the most used feature i.e Contacts, to the next level. xContacts is a free utility app, that does more than just adding extra details.
Developed by AppFactor, the same people who brought us iDownload PLUS; xContacts does not fall short in any department as far as productivity, usability and features are concerned. The app is largely designed with a user in mind and how he/she use their contact book on a daily basis.