Pentaho Business Analytics

A really complete BI solution. Excellent ETL module (PDI\Kettle), with some awesome visualizations. The maintaning company acquired Webdetails, one of the main plugin developers. Everyone interested in BI should take a look at this software, even if just to understand another form of developing MIS. Cons: Very heavy (in particular the Mondrian MDX server when executing true functions like stdev and correlation), requires a powerful machine to run. Depends a lot on third-party plugins that have their own stability issues.