I figured where better than the Warrior Forum to first tell about our free article spinner. SpinChimp has been kicking about for a while now, but we just released a Basic version which is a free download.
SpinChimp - Download
Make sure you use the little baby monkey link on the left! The link on the right won't work as it is the paid version.
This thing is lighting fast and has access to the full user generated thesaurus. You won't get all of the Pro features, but it is still enough for most spinners.
Hope you enjoy it! Let me know what you think...