Altova XMLSpy - The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.

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.

XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.

Drupe - Next generation contact manager and dialer.

Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.

Simple Contacts - Contact lens prescriptions from home