La_Azada is an OLAP client developed in java (Eclipse Rich Client Application), and based on olap4j. Supports mondrian and XMLA drivers.
Simple to use, integrated Mondrian, quite good as another tool in the toolbox for working with OLAP info. matteotaverna's review is in pretty bad taste, and likely stems from the fact that he is the author of another OLAP project here on sourceforge. he has helpfully added "bad, bad" reviews to several other tools. pathetic. grow up.