I did do a search for this, and there was a couple of requests already (one from august 06, and one from march 07), but I thought I would bring it up again since I seen a few people requesting accounting software recently.
it's an open source personal finance software. according to the sourceforge page it's written in c++
home page: http://www.thezeal.com/software/index.php?Money_Manager_Ex
Sourceforge page: http://sourceforge.net/projects/moneymanagerex/