moneyGuru is a personal finance management application. It allows you to evaluate your financial situation so that you can make informed (and thus better) decisions. Most finance applications have the same goal, but moneyGuru's difference is in the way it achieves it. Rather than having reports which you have to configure (or find out which pre-configured report is the right one), your important financial data (net worth, profit) is constantly up-to-date and "in your face". This allows you to constantly make informed decision rather than doing so periodically.
Skrooge is a personal finances manager powered by KDE. It allows you to keep track of your expenses and income, categorize them, and build reports. You can also manage your investments and see how they perform over time. Multiple accounts are supported. Some of the features included are advanced graphical reports, tabs that help you to organize your work, infinite undo/redo (even after the file was closed), instant filtering on operations and reports, infinite category levels, mass update operations, scheduled operations, tracking of refunds, automatic processing based on search conditions, and support for multiple currencies.
FreeDebks (Free Double Entry Bookkeeping System) is simple double entry accounting software. It stores data in an XML format. FreeDebks has a simple and intuitive GUI. It provides a totally customizable chart of accounts, so each user will reach their needs. It also provides features to help the user write entries and close the accounting. FreeDebks is not an ERP. With FreeDebks, you can only do accounting. It targets people with at least basic accounting skills who want to keep books for themselves or an association or a small company.