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Apache OFBiz is an open source enterprise resource planning (ERP) system. It provides a suite of enterprise applications that integrate and automate many of the business processes of an enterprise.

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Dolibarr ERP CRM is an open source, free software package for companies of any size, foundations or freelancers. It includes different features for enterprise resource planning (ERP) and customer relationship management (CRM) but also other features for different activities.

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

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GnuCash is an accounting program that implements a double-entry bookkeeping system. It was initially aimed at developing capabilities similar to Intuit, Inc.'s Quicken application, but also has features for small business accounting. Recent development has been focused on adapting to modern desktop support-library requirements.

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HomeBank is a personal accounting software package that runs on OpenBSD, Linux, FreeBSD, Microsoft Windows, macOS and AmigaOS. Released under the GPL-2.0-or-later license, HomeBank is free software. HomeBank can be found in the software repositories of Linux distributions such as Debian, Fedora, Mandriva, openSUSE, Gentoo Linux, Arch Linux and Ubuntu.

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JFire was an Enterprise Resource Planning and Customer Relationship Management system.

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KMyMoney is a cross-platform double-entry bookkeeping system for personal finance management built on KDE technologies. Its operation is similar to Microsoft Money and Quicken. It supports different account types, categorization of expenses and incomes, reconciliation of bank accounts and import/export to the “QIF” file format. Through plugins, direct download using the OFX and HBCI formats is also possible. CSV imports and exports are also possible via plugins.

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LedgerSMB is a free software double entry accounting and Enterprise resource planning (ERP) system. Accounting data is stored in a SQL database server and a standard web browser can be used as its user interface. The system uses the Perl programming language and a Perl database interface module for processing, and PostgreSQL for data storage. LedgerSMB is a client-server application, with server access through a web browser.

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RCA Open-Source Application (ROSA) is an open-source management accounting application that aims to provide decision support information to managers. Resource consumption accounting (RCA) is a principle-based approach to management accounting that combines German management accounting techniques known as Grenzplankostenrechnung (GPK) with a disciplined form of activity-based costing.

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SQL-Ledger is an ERP and double entry accounting system. Accounting data is stored in an SQL Database Server and a standard web browser can be used as its user interface. The system uses the Perl language with a database interface module for processing and PostgreSQL for data storage which is the preferred platform. The download version also includes schemas for IBM's DB2 database server as well as Oracle.

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Tryton is a three-tier high-level general purpose computer application platform on top of which is built an Enterprise resource planning (ERP) business solution through a set of Tryton modules. The three-tier architecture consists of the Tryton client, the Tryton server and the Database management system.