Brand new Unifeed extension is available for free download!
This extension is an easy and flexible tool to create product feeds
in multiple formats (csv, txt or xml) for any external platform which need to import your catalog.
Unifeed is completely open source and compatible with Magento CE 1.9.x.

Download Unifeed at our store or on Magento Connect.
Read carefully about compatibility in extension’s description.

For italian-speaking users read this post.