Any Open Source / free ETL out there?
Isn't Kettle (Pentaho Data Integration Community Edition) still available without licensing fees? 

Kettle 4.1 was released to the community as a stable release in fourth quarter of 2010. The community is currently working on a minor patch release to 4.1. Kettle continues to be a community supported product. Kettle may be a more appropriate tool in your sandbox or development environments. 

However, in a production environment you may find that PDI Enterprise Edition with technical support from Pentaho more appropriate for your mission critical systems. 

After discussion in comments below:
 Pentaho Data Integration (PDI - ak "Kettle") is still maintained (4.4 was release 2012-09) and Open Source. It can be downloaded from here: http://sourceforge.net/projects/pentaho/files/Data%20Integration