Wikipedia
LedgerSMB
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 has Multitenancy support.
LedgerSMB is distributed under the terms of the GNU General Public License.