Yes Invoice - Online invoice management for entrepreneurs and freelancers.
Ledger-cli.org - Ledger is a powerful, double-entry accounting system that is accessed from the UNIX command-line.
Simple Invoices - Never Wait For Clients To Pay You Again!
Grisbi - Accounting for everyone !
FreshBooks - The ideal accounting software for small business owners.
Toshl - See your expenses in beautiful and informative graphs. Save with budgets and monitor your income.