The CDG file type is used by the CanoDraw software by Microcomputer Power. Canoco is a windows version of the older DOS CANOCO 3.1 program. CanoDraw is a program that enables on-screen graphs and publication quality output that can be edited on Mac and PC.
AVS Video Converter
AVS Video Converter: an all-in-one video converter AVS Video Converter is a Windows application and part of the AVS company.