It is a visual RAD tool for building COM Add-ins, Smart Tags and RTD servers in Delphi 5, 6, 7, 2005 and 2006. It implements everything required by the supported technologies such as IDTExtensibility2, ISmartTag and ISmartTagTopic, you write functional code only. Add-in Express supports Outlook, Excel, Word, PowerPoint, Access, Visio, FrontPage, Project, MapPoint and Publisher. Read more on http://www.add-in-express.com/add-in-delphi/