Gone - An ephemeral to-do list

Evercontact - Your contacts always up to date and automatically with Evercontact.

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

CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses