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.

Plan - Plan is a better way to organize.

Drupe - Next generation contact manager and dialer.

Streaks - The to-do list that helps you form good habits.

Simple Contacts - Contact lens prescriptions from home

Taskful - Deadlines, meet your match.