ERPNext is an web based, open source application that helps small and medium sized business manage their accounting, inventory, sales, purchase, manufacturing, projects, customer support and website.
This product has been in the works in different ways since 2005 and was launched in 2010. It is used by about 100 companies in over 30 countries in varied domains such as Manufacturing, Retail, Distribution and Services.]
There are a lot of nice single module (Accounting, Invoicing, Customer Support, Projects) apps available for business but nothing that is integrated. The integrated options are usually too expensive and too complex to use. ERPNext fills this gap by providing a friendly and affordable app with all the features of a full ERP.
It includes integrated modules like CRM, Purchase, Stock and Inventory, Accounting, Production, Support, Project and other productivity apps.
More info is available on www.erpnext.com.