Was a commercial Go database program designed for searching patterns, such as when studying Fuseki and Joseki. The database contains 53059 professional games in a proprietary format (as of April 24 2011). Updates are (were) available to all registered users.
The only known remaining distributor is Hebsacker Verlag
Direct link (in German): http://www.hebsacker-verlag.de/product_info.php?cPath=59_15&products_id=75