Watchdoc software is now certified in 12 of most famous and big printing companies on the world and also certifying is in progress for 3 other companies. You can here look at the table of this program:

  Certified In Progress
Brother    
Canon    
Dell    
Epson    
HP    
InfoPrint    
Konica Minolta    
Kyocera    
Lexmark    
Océ    
Oki    
Ricoh    
Samsung    
Sharp    
Toshiba    
Xerox