pocOLAP
the "little" OLAP-project
"poco" is the Spanish and Italian word for "little". "pocOLAP" gives you a little taste of OLAP reporting, without the big budget or time requirements.
pocOLAP provides a web-based, crosstab reporting tool that looks like a standard spreadsheet. You can select which fields to display across the top and down the side. You can even drill down for more detail.
While it's not an OLAP server or full fledged data mining solution, pocOLAP makes your data easy to use and understand. And perhaps best of all, it's free!
pocOLAP is generously hosted by SourceForge