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.

BareMetrics - SaaS Analytics for Stripe

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

Probe - Revenue metrics. Sales metrics. Business costs. All in one place.

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

ChartMogul - Master your recurring revenue. Advanced subscription analytics with one-click.