Gnucash

GnuCash is a free, open-source accounting software designed for personal finance and small business use. It implements double-entry bookkeeping, the accounting standard that balances debits and credits across all transactions. Users can track bank accounts, investment portfolios, income and expenses with a checkbook-like interface, generate detailed financial reports, and reconcile accounts. GnuCash supports multiple currencies, tax-related features, scheduled transactions, and integrations with financial institutions. Because it is free, available on Windows, macOS and Linux, and requires no subscription or proprietary vendor lock-in, it is popular with accountants, small business owners and individuals who want full control over their financial data.