I am always looking for a better way to manage my contacts. The Mac and iOS Contacts App leave much to be desired. I just came across Interact, a contact manager from Greg Pierce, the guy behind Drafts.
This one might be worth taking a spin.
Do more with your contacts! Interact helps you create, organize, and communicate with your contacts in ways that just haven’t been possible before. It’s built to help you do more in less time and flex for the way you work.
Source: Interact | Agile Tortoise