OpenI plugin for Pentaho CE provides a simple and clean user interface to visualize data in OLAP cubes. It supports both direct Mondrian and xmla based connections like Microsoft SQL Server Analysis Services (SSAS), plus provides add-on features like Explore Cube Data, custom SQL for drillthrough data, publishing drillthrough data to external web services etc.
Advanced Analysis Services is a Business Intelligence (BI) tool to let users analyze OLAP sources like Pentaho, Mondrian, Microsoft Analysis Services (MSAS) or Hyperion, in an intuitive way, based on analysis templates like Paretto, Ranking and BCG