Neo Billing is a Well Designed Business Billing & Accounting Solution. Application is packed with ton of features like Invoicing, Quotations, Purchase Orders, Inventory Management, Customer Management, Supplier management, Project Management, Accounts, Data & Reports, REST API, CRON JOBS, Employee Management with distinct user roles.

Demo: https://codecanyon.net/item/neo-billing-accounting-invoicing-and-crm-software/20896547