The Gifu Challenge is an annual computer Go championship held in Ogaki City, Japan. The 2003 event was the last computer Go competition which had good representation from the world's top Go programs.
2007 (Canceled due to lack of funds http://computer-go.org/pipermail/computer-go/2007-July/010794.html)
2006 ( crosstable)
2004 ( crosstable)
2003 ( crosstable)
The North Korean program KCC Igo is sold as Silver Star in Japan.