Buddi is a personal finance and budgeting program, aimed at those who have little or no financial background. In making this software, I have attempted to make things as simple as possible, while still retaining enough functions to satisfy most home users.
Buddi is released under the GNU General Public License. Since Buddi is released as Open Source Software, everyone has free access to the source code (available for download from the SourceForge project page).
Windows/Mac/Linux
http://buddi.thecave.homeunix.org/en/download.jsp
Project Page at SourceForge