Sage One Alternatives

ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software developed by Frappé Technologies Pvt. Ltd. and is built on MariaDB database system using a Python based server-side framework.

Odoo (formerly OpenERP) is a suite of open-source business apps written in Python and distributed under the AGPL license, under the Open Core software business model. It is used by 2 million users worldwide to manage companies of all size.

inoERP is an open source php based enterprise management system.

Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and uses PostgreSQL as database engine. It's the core base of a business solution providing modularity, scalability and security.

Insightly is a web-based project and Customer Relationship Management (CRM) application that integrates with Google Apps via a Gmail contextual gadget and Google Docs support.

Xero is beautifully designed accounting software that lets you manage your small business finances anywhere, anytime.

webERP is a complete web based accounting/ERP system that requires only a web-browser and pdf reader to use. It has a wide range of features suitable for many businesses particularly distributed businesses in wholesale and distribution.

Compiere open source ERP software provides a modern, highly adaptable, low-cost ERP business solution

One central platform to sell, bill and organise your work. Stop the mess with information spread across different tools, Excel sheets, and inboxes, and collaborate efficiently with your colleagues.

ADempiere is a commons-based peer-production of Open Source ERP Applications. This project has a bazaar of Citizens which votes in a Project Management Committee every two years.