All about Gordian Knot. Gordian Knot started out as a simple bitrate calculator for DivX encoding but has evolved to become an integrated package or tool for the entire process of DivX encoding. Gordian Knot was originally written by TheWEF but has since been made into an Open Source project. Gordian Knot is available for download in several packages, including a system pack, codec pack and as the executable only. Sound cool? Download Gordian Knot.