Which the best ETLTool from opensource

hi
Which one is the best ETLtool (from opensource).
i want to use that one to get table format from raw data.

Hello,
you can find CloverETL, Pentaho and Kettle comparison on our www pages (CloverETL Performance). Independent comparison of different ETL tools can be found in article My Review of the ETL Vendor Comparison Report from http://WWW.ETLTOOL.COM