Pentaho is built on Java Enterprise Edition and runs on the JBoss web server. It is best known for data integration and data mining that help it support complex business analytics. At the same time, it has some limitations that make it a better fit for IT than for the average business user. With its strong workflow automation capabilities, this business intelligence (BI) suite can be a good choice for enterprises that want to build strong reporting functionality into their business processes.

Eclipse BIRT

Business Intelligence and Reporting Tools (BIRT) is an open source project sponsored by Actuate. It's designed primarily for Java web applications and consists of a design engine, report engine, and chart engine. Each engine is OSGi compatible, but can be run without OSGi if desired. The products offered via the BIRT architecture are the report designer, chart builder, and example viewer.

JasperReports Server

JasperReports Server is a stand-alone and embeddable reporting server. It provides reporting and analytics that can be embedded into a web or mobile application as well as operate as a central information hub for the enterprise by delivering mission critical information on a real-time or scheduled basis to the browser, mobile device, printer, or email inbox in a variety of file formats. JasperReports Server is optimized to share, secure, and centrally manage your Jaspersoft reports and analytic views.

SpagoBI

SpagoBI is part of the SpagoWorld open source initiative founded by Italian IT services company Engineering Group. Its developers proclaim SpagoBI to be the only “entirely open source” business intelligence suite. The BI suite consists of some 15 components – from reporting, OLAP and data mining to charting, dashboards and ETL. Version 2.7 of the SpagoBI server was released last month and includes an interactive dashboard and integration with other reporting tools.

RapidMiner

Rapidminer is the leader in open source provider for data mining and business analytics. The community edition is open source which can be downloaded from website.RapidMiner Server lets to run processes on enterprise hardware from anywhere, without restrictions.

Splunk

Splunk stands apart from other BI tools in its focus on embedded technology. This enterprise solution allows businesses to collect, index, and search their machine data with ease. Brian Gilmore, Product Manager for Enterprise Intelligence at McKenney's, described how Splunk enables this engineering's customers (including multi-site organizations) to manage their facilities with greater efficiency. "We're basically dumping data on a 1 minute, 5 minute, or 15 minute basis into Splunk.

ART - Reporting Tool

ART stands for A Reporting Tool and is a free Open Source Business Intelligence solution .ART is a lightweight, multiplatform, web based query tool and reporting environment. SQL queries can be published in a few minutes. It supports tabular, crosstab, charts, scheduling, email alerts, drill down, among other features. Results are exportable to spreadsheet/pdf, can be reversed to a database table (cached), can be embedded in a portal-like page or retrieved via a smartphone.

JMagallanes

The open source project JMagallanes is an end user application for Olap and Dynamic Reports written in Java/J2EE. It combines static reports (based on JasperReports), a Swing pivot table for OLAP analysis, and charts (based on JFreeChart).

NextReports

NextReports provides NextReports Designer, NextReports Engine and NextReports Server. NextReports Designer is an AdHoc Query and Reporting software that promotes simple, fast and powerful report creation, which runs on any operating system that supports Java 1.7 . NextReports Engine is a lightweight java reporting engine that could be embedded in any application or used on their own. NextReports Server is a reporting server that helps automating production and delivery of business reports.

Mondarin

Mondrian is an Open Source Business Analytics engine that enables organizations of any size to give business users access to their data for interactive analysis. You can build powerful Business Intelligence solutions with Mondrian as your Online Analytical Processing (OLAP) engine, enabling multidimensional queries against your business data, using the powerful MDX query language.