Plaxo, Inc, helps to keep people connected solving the problem of obsolete contact information. It provides a free service that updates and maintains the information of your address book.
In addition to this free service, Plaxo also offers premium services sold on an annual subscription basis. Once you have downloaded and installed the software you will have access to the service though the contact management application. You can also join to “Plaxo Online” that gives you an online account with your contacts, calendars, task and notes and you can have access to them anywhere and it offers an online back up of your data. Remember to read the terms of service before any application. 
