ERPNext is an award winning open source ERP applications that helps small and medium sized business manage and grow their business with systems that were only affordable for large enterprises. With ERPNext you can manage your Accounting, CRM, Billing, Inventory, Purchasing, Projects, Payroll, Customer Issues all in one app. Also, it has domain specific modules like schools, healthcare, agriculture and non-profit

ERPNext also comes with a Mobile app that  helps you manage your business on the go so you can get the latest notifications, follow up on opportunities, orders, invoices, customer issues and much more while you are on the move.