Contacts!

Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.

FullContact's apps let you keep all your contacts in one place, automatically up-to-date. This social contact management software automatically cleans your contacts, enriches them with social profile data, and continually syncs them across devices with all your contact sources. You can also merge duplicate contacts, scan business cards, capture email signatures, and more.

With Free Address Book - Free Phone Book you can note the addresses, phone numbers, mobile, fax, company name, country, city, website address and email addresses of your contacts and partners.

ID Book is a handy, easy to use application specially designed to offer users a simple address book.

Syncs contact between various third-party services and helps to clean them up and merge data.

E-Z Contact Book is a free easy to use yet powerful Windows program to store and manage contact information. You can use it as a business directory, customer database, or a personal contact address/phone book.

es-Builder is a flexible, customizable, friendly, powerful and unique database manager for private personal use.

SYNCING.NET offers powerful Data and Outlook synchronization for individuals, professionals and businesses. By providing secure PC synchronization, integrated file and Outlook sharing, users can access all their data at any time and any place. Rather than installing and running different applications or handling servers - SYNCING.NET gives you a powerful solution that is simple, secure and affordable.

Address book program providing unified, flexible and simple interfaces for you to manage and lookup contact info of people and organizations.

KAddressBook stores all the personal details of your family, friends and other contacts.

Advanced Phonebook is a convenient alternative to a regular phone and address book. All necessary functions are available for storing contacts and working with phone numbers and addresses. Special features include alphabetical index, groups and categories, search and sort, and a variety of HTML and CSV report options. In addition to phone numbers, Advanced Phonebook can store all other contact data such as email addresses, Skype, AOL, MSN, etc.

Synchronize any Microsoft® Outlook® folder with anyone elses (except Drafts, Outbox, Sent Items and Deleted Items). The folders you allow to be synchronized will do so in the background by e-mail. You can easily synchronize Outlook folders through the internet without the need for both parties to be online at the same time. If you have private data elements on Outlook you can exclude them from the synchronization process. It is also possible to synchronize only objects of a user defined category. Synchronize Outlook data on your laptop with your desktop. »

OLContactSync allows you to easily synchronize your Outlook contacts with any other Outlook user’s contacts per E-Mail for free.