Open Source Business Intelligence Tools in Java

RapidMiner (formerly YALE) is the world-wide leading open-source data mining solution due to the combination of its leading-edge technologies and its functional range. Applications of RapidMiner cover a wide range of real-world data mining tasks.

SpagoBI is an integration platform focused on business intelligence needs at the enterprise level. It's a full open source solution (no professional edition). SpagoBI offers a complete analytical layer (e.g.: reporting dimensional analysis -OLAP-, data mining, dashboards, free and visual data inquiring) with many solution for every area, allowing the end-user to compose the platform best suited for him/her, also mixing open source and proprietary products in order to maximize the overall ROI.

Talend is a provider of open source data integration software. Talend offers open, innovative and powerful data integration solutions, used primarily for integration between operational systems, ETL, and migration by organizations of all sizes.