Chessbase (full list of available downloads from the chessbase site)
Downloads (patches, demos, upgrades, webpublishing etc..)
DGT
DGT Downloads Section Match Clock and Standard Clock manuals, Latest Board Drivers including the new plugin for the ICC Interface Blitzin and updated Drivers for Fritz and CPS Light
ChessMentor
Chess Mentor Demo 1.85MB, runs on win 3.11/95/98/NT.