GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.

Money Manager Ex - Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software.

KMyMoney - KMyMoney is a personal finance manager for KDE.

HomeBank - Access Financial Services. Easy, fee-free banking for entrepreneurs Get the financial tools and insights to start, build, and grow your business.

GreenStash - GreenStash is a simple FOSS android app to help you plan and manage your savings goals easily and establish the habit of saving money.

Ledger-cli.org - Ledger is a powerful, double-entry accounting system that is accessed from the UNIX command-line.