Hunter - Find all the email addresses related to a domain
BareMetrics - SaaS Analytics for Stripe
Leadfeeder - Leadfeeder converts your website visitors into sales. Connect your website's Google Analytics to Leadfeeder and unlock the power of seeing who`s visiting your site!
Account Dock - Billing history for your Stripe App
Email Verifier - Email verifier app lets you verify email.
Salesforce Data.com - Data.com provides company profiles and contact information across millions of businesses worldwide.