Free contacts software for windows

My Contacts is a free widget that keeps all your buddies info in your fingertips.
Main features:
- Scroll through the contacts
- Change the theme color
- Add/Update/Edit options
- Double click to copy the contact info

Plaxo is a tool that enables you to automatically update your Outlook and Outlook Express address book.
You no longer have to worry about whether your contact list is up-to-date.
You choose which people from your address book you want to get updated contact information from -- you can choose as many or few people as you like.
It sends a simple email message to each of these people, showing the contact information you currently have in your address book on them and requesting them to correct the out-of-date information.
The replies to these emails are processed by Plaxo and automatically inserted into your address book.
You will receive notifications as the update replies come in.

Contacts Express software was designed to be an address book program providing unified, flexible and intuitive interfaces for you to manage and lookup contact info. Contacts Express can store unlimited custom info and interact with Email programs, Web browsers, Phone Dialer, Skype, Google Maps etc.
Main features:
- Unlimited data fields to store any contact info. Along with predefined fields, you may add unlimited data fields grouped by section.
- Comprehensive Categories. You may click on a category to view contacts of the category, or right click to list contacts of subcategories recursively.
- Interact with Windows applications of telephony, Skype, Web/File browsing, MS Outlook, Mozilla Thunderbird or any default Email program etc.
- Map service with Google Maps, supporting single line address and multi-line address.
- Attach unlimited photos and files .

This is a firefox extension which is used as a simple Contact manager that saves and edits contact information