Ramp Receipts - Create a receipts/invoice dashboard for Stripe
Receiptful - Receipts that increase CLTV. Exclusive (early access to PH)
QuickReceipts - A mobile app that automatically tracks, organizes, and stores your digital receipts privately on your device.
Quick Order Printer - Easily create receipts, statement of delivery and invoices
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value
Crow.app - Pricing and experimentation tools for Stripe