Open Source Java Financial Software for Linux

jGnash is a cross platform personal finance application written in Java. jGnash is a double entry system with support for multiple currencies. jGnash can import OFX and QIF files.

Fakturama is an open-source software solution designed for enterprises for creating invoices, as well as delivery notes, while managing and editing your online web shop. Fakturama was especially created in order to provide a comprehensive invoicing program that is compatible with office suites used worldwide, like LibreOffice and Apache OpenOffice. Fakturama makes it easy to create invoices, manage products, contacts, documents, payments, shippings, VATs and all the other constituents of a web shop.

Business J is a collection of software providing essential business tools. It includes contact (ContactJ), project (ProjectJ), sales (SalesJ), and financial (AccountJ) management tools written in 100% pure java with full user documentation.

Open source ERP system base on CORBA technology.

A multilingual customer relationship management (CRM) system for media organizations that features powerful modules for sales automation, customer service, incoming and outgoing email, template-based HTML newsletters, and a WYSIWYG editor.

Automated trading system extracts stock quotes from Forex, MetaTrader and tries to detemine points to open/close orders. Using moving average. Implemented in Java. Future versions will use such cool stuff as data mining and artificial inteligance.