Data Transformation Tools [closed] - etl

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HI
Are there any free comparison papers for ETL tools.
thanks
Ben

Kettle from Pentaho is an open source ETL tool that you can look into. Here are some comarision links
http://www.jonathanlevin.co.uk/2008/03/open-source-etl-tools-vs-commerical-etl.html
Commercial: http://www.etltool.com/
comparision from pentaho itself: http://www.pentaho.com/docs/informatica_pentaho_etl_tools_comparison.pdf

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