GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
Pecunia - Open Source HBCI Pin/TAN Online Banking Software.
MoneyMoney - Alle Bankkonten im Blick mit MoneyMoney. Finden Sie heraus, wo Ihr Geld herkommt und wo es hingeht.
Grisbi - Accounting for everyone !
Xero - Xero is online accounting for your small business.
Quicken - Stay in control of your monthly cash flows, budgets, and expenditures. Quicken provides a navigable interface where you can organize your debit, credit, and savings, and build good habits accordingly.