Ledger-cli.org - Ledger is a powerful, double-entry accounting system that is accessed from the UNIX command-line.
Plaid - Infrastructure that powers financial technology by enabling applications to connect with users' bank accounts.
Grisbi - Accounting for everyone !
Verafin - Verafin provides compliance, anti-money laundering, and fraud detection software.
Toshl - See your expenses in beautiful and informative graphs. Save with budgets and monitor your income.
QuoteMedia - Financial web tools that allow users to access real-time stock quotes, with live charts and NASDAQ level 2 data.