FireAcad Design Software - AutoCAD extension for fire sprinkler designers. The program aids in design, hydraulic calculations and material listing. AC Plant Designer - A plant design and construction toolkit connecting AutoCAD with database functionality. Survey, Cogo and Drafting - Surveying, coordinate geometry, digital terrain modelling, and drafting applications for Intellicad and AutoCAD, as well as free autolisp routines. Design Master Software, Inc. - HVAC and electrical building design and drafting software for AutoCAD. Roof Builder Tools - A 3D roof modelling shareware for AutoCAD. AB Studio - CADCON is an extension to AutoCAD or Architectural Desktop for structural and building services design. Inopso GmbH Interoperable Solutions - Offers an IFC-Interface for Architectural Desktop, which allows to exchange architectural data according to IAI standards. MultiSuite Software - 2D and 3D steel and concrete detailing for AutoCAD. Also available as platform-independent incorporating AutoCAD OEM technology. Advanced Graphics Technology, Inc. - Software for Cogo, legal descriptions, TIN models, contours, and sections, based on AutoCAD and LandDesktop. KLH Software, Inc. - Architectural drafting system for AutoCAD that provides an array of productivity tools designed to speed the commercial and residential drawing process. SYCODE - Offers terrain modelling software for AutoCAD and as a standalone product, as well as general meshing software.