Use SaaS Blocks 2.0 with Invoice Ninja

SaaS Blocks is a collection of +200 tools to augment your SaaS application - from messaging APIs and payments SDKs to analytics, dashboard, authentication providers.

Invoice Ninja is a free, open-source solution for invoicing and billing customers. With Invoice Ninja, you can easily build and send beautiful invoices from any device that has access to the web. Your clients can print your invoices, download them as PDF files, and even pay you online from within the system.