SiS has new 740/65x integrated VGA drivers 2.18.
VIA has new W9x VGA drivers for CLE266 and new W2K/XP drivers for KN/KM400. I included a link to S3 Twister / ProSavage / ProSavage DDR integrated VGA on older VIA chipsets. Read more for the links SIS740/65x W2K/XP full package
SIS740/65x Win98/ME full package
VIA CLE266/KN400/KM400 drivers