Google 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.

ReCsvEditor - Csv / Tsv / Delimited file editor. Supports for very large Files.

Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.

AZZ Cardfile - AZZ Cardfile is simple to use software that helps manage and organize any kind of records. It can serve as Rolodex, PIM, contact manager, address book, small database.

Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.

AtoZ Notebook - AtoZ Notebook is a simple, password protected Data Manager.