ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Receiptful - Receipts that increase CLTV. Exclusive (early access to PH)
fusebill - Fusebill is the leading recurring billing and subscription management software for businesses. Try Fusebill for subscription billing made easy!
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.
Productfy - The most advanced platform for building fintech applications