The Front-edit Address Book is a powerful, but easy to use address book component for Joomla. If you are looking for a address book, or just a component that allows users to manage contact information directly from front,  this might be what you are looking for.

Some features:

• Allows users to create, edit and delete contact information directly from front.
• Multiple layouts available ("table", "list" and "single contact layout").
• Some access control based on usergroups or individual users.
• The component is designed to work together with com_contact (the joomla core contact component).