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
Drupe - Next generation contact manager and dialer.
Salesforce Data.com - Data.com provides company profiles and contact information across millions of businesses worldwide.
Simple Contacts - Contact lens prescriptions from home
Stunning - Dunning emails, failed payments, churn prevention, event notifications, custom HTML receipts and more for Stripe subscriptions, with iPhone app and push notifications