cl-ledger
CL-Ledger is a powerful, double-entry accounting system for Common Lisp. A port of the C++ based Ledger by the same author (John Wiegley).

Source code: https://github.com/jwiegley/cl-ledger

License: BSD

ASDF-install package (obsolete) http://mahmud.arablug.org/cl-ledger.tar.gz

Note: from a quick overview of the sources, it is not multi-currency, and doesn't use a specific type for the amounts, so you may get the surprising floating-point effects).


Business application