GnuCash Double-Entry Accounting Program.

Money Manager EX is a simple money management software, released free and available for Windows, Linux, MacOS, Android and iOS.

MonkeyPeanuts.com is an online personal finance tool to help you manage your budget and save money.

HomeBank is a personal accounting software package that runs on OpenBSD, Linux, FreeBSD, Microsoft Windows, Mac OS (via macports or homebrew) and AmigaOS.

Moneydance is a personal finance software application.

moneyGuru helps you compare loans, credit cards, mortgages and life insurance online.