Free Invoice Generator - A free invoice generator for startups
Receiptful - Receipts that increase CLTV. Exclusive (early access to PH)
Ramp Receipts - Create a receipts/invoice dashboard for Stripe
QuickReceipts - A mobile app that automatically tracks, organizes, and stores your digital receipts privately on your device.
Envoice - Send invoices and get paid on Paypal, Payoneer, Stripe and Square.
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value