Grisbi - Open Source Accounting

Grisbi is a personal finance system which runs under Linux and Microsoft Windows. Grisbi can manage multiple accounts, currencies and users. It manages third party, expenditure and receipt categories, as well as budgetary lines, financial years, and other information that makes it suitable for associations (except those that require double entry accounting).

Presently www.Grisbi.org/‎ is under maintenance!!!

SQL-Ledger - Open Source Accounting

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.

Lazy8Ledger - Open Source Accounting

Lazy8Ledger is a open source accounting software. Lazy8Ledger is quite comprehensive and is a highly functional example of accounting software, offering up all of the features that someone running a business needs in order to monitor the state of their finances and produce graphs that show visual representations of their business’ money and cash flow.

Open Source Invoice System

This Open Source, Web-based invoicing system makes billing your customers a breeze. It's accessible from anywhere and has a batch of features that should satisfy all but the most demanding users.