Grisbi is a very functional personal financial management program with a reasonable set of homefinance features.
World's #1 Open Source ERP
World's #1 Open Source ERP, Accounting, CRM for SMBs. Mac, Windows, Linux and Mobile. Rich API to connect third-party apps. FREE user registration, demos and trial offers, plus commercial editions and add-ons at http://www.xTuple.com.
KMyMoney is the Personal Finance Manager for KDE. It operates similar to Quicken, supports various account types, categorization of expenses, multiple currencies, online banking support via QIF, OFX and HBCI, budgeting and a rich set of reports.
Building High Quality ERP and Accounting Software for SMB & SME
LedgerSMB is an ERP, featuring accounting (including AR, AP, and GL), quotation and order management, and more, for businesses with small to medium transaction volumes. The system has been shown to easily handle thousands of AR/AP transactions per week. Data integrity, security, quality, and responsiveness are key values for our community, both among the developers and, we hope, the users. Additionally we aim to make LedgerSMB into a platform to integrate with, or even serve as a framework for building, other applications. We highly value community contributions and aim to stimulate growth through a broad community by actively providing support and documentation.