
Description: Billbooks is an open-source accounting and invoicing software designed for small businesses. It offers features like double-entry accounting, recurring invoices, financial reports, and more. Billbooks is free and available for Linux, Windows, and Mac.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Zoho Invoice is an online invoicing software that helps small businesses create professional invoices, get paid faster, track expenses, and manage financial workflows. It integrates with other Zoho apps and allows easy customization with over 25 languages supported.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API