There's an old discussion of this app here, but at that time it was essentially for Linux:
Gnuaccounting is a Linux / Windows app, described as portable. It works with LibreOffice and with Open Office.
From their website at http://www.gnuaccounting.org/index.php?id=3
"Gnuaccounting is a Free Java cross-platform accounting and bookkeeping application.
We have reasons to call it "beta".
Gnuaccounting's most recent version is 0.8.2, released 2013-01-17"
It's under the GPL license.
I don't know how good or useful it is, but am posting it here if someone is interested.
There is also a short discussion of it on TechRepublic, with a tutorial of installing it on Linux. http://www.techrepublic.com/blog/smbit/give-this-free-libreoffice-integr...