We have developed and implemented specific algorithms that handle all nuances of all nine of the Sequence Rules for tetrahedral centers and double bond stereochemistry, two of which are opensource Java applications (Centres and Jmol, which also has a JavaScript equivalent). All are freely available in binary format. We have developed a robust testing suite for algorithms that implement the CIP Sequence Rules. This suite covers a wide variety of possible issues that might arise in the course of any algorithm development.