Free accounting software

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.

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), and also other features for different activities.

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 (mainly PostgreSQL).

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. KMyMoney is free software.

ERPNext is a free and open-source integrated enterprise resource planning (ERP) software developed by an Indian software company Frappe Technologies Pvt. Ltd. It is built on the MariaDB database system using Frappe, a Python based server-side framework.

JFire was an enterprise resource planning and customer relationship management system.

Open source enterprise resource planning software

HomeBank is a personal accounting software package that runs on BSD Unix, Linux, Windows, macOS (via MacPorts or Homebrew) and AmigaOS.