Finance manager

InvoicePlane is a free and open source application to manage your quotes, invoices, payments and customers.

KMyMoney: The best Personal Finance Manager for free users

Moneydance is a powerful yet easy to use personal finance app for Mac, Windows, Linux, iPhone and iPad. With online banking, online bill payment, investment management and budgeting, Moneydance provides all the features of Quicken plus benefits such as ease of use and no sunsetting of features.