In addition to the larger workflow system vendors listed in appendix A, several Adobe partners specialize in plug-ins for InDesign and InCopy. There are many more plug-in vendors supporting InDesign than we have listed here, but we've assembled a short list of plug-ins of special interest to users involved in editorial workflows that include InCopy. This list may change frequently, but you can get a comprehensive list of InDesign plug-ins on the Web at