3D Stupid Software - 3D CAD software for creating 3D architectural window and transom blocks used in 3D architectural design, brick wall options. - http://www.eznow.net/ezcad/index.html
MillLister, Inc. - SmartLister AutoCAD extension to retrieve cut lists and bill of materials from 3D solid model assemblies, for home building and furniture work. - http://milllister.com/
CadPoint, Inc. - Provides Structural CAD, a structural engineering design software for steel, wood, and concrete compatable with Audodesk AutoCAD. - http://www.cadpointinc.com/
SYCODE - Offers terrain modelling software for AutoCAD and as a standalone product, as well as general meshing software. - http://www.sycode.com/
KLH Software, Inc. - Architectural drafting system for AutoCAD that provides an array of productivity tools designed to speed the commercial and residential drawing process. - http://www.klhsoftware.com/
Alexander Kosov - GEOL_DH for graphical representation of geological, surveyor, mining and calculation data in 3D space. KAI-2001 package for geologists and geophysicists, surveyors and miners, builders-designers. - http://geol-dh.ru/en_index.html
Trace Software - The Trace Elec Pro electrical schematic solution for AutoCAD, and the Trace Plant Designer package for industrial installation and piping design. - http://www.traceindustry.com/
drcauto - Developers of the Smart Architect range of architectural extensions to AutoCAD and AutoCAD LT, as well as a 3D modeller, and a LISP enabler for AutoCAD LT. - http://www.drcauto.com/
PERI GmbH - Offers the PERICAD AutoCAD extension and ELPOS for formwork planning with PERI Formwork and Scaffolding. - http://www.peri.de/ww/en/pub/aktuelles/start.cfm
Advanced Graphics Technology, Inc. - Software for Cogo, legal descriptions, TIN models, contours, and sections, based on AutoCAD and LandDesktop. - http://www.agtcad.com/
MultiSuite Software - 2D and 3D steel and concrete detailing for AutoCAD. Also available as platform-independent incorporating AutoCAD OEM technology. - http://www.multisuite.com/
Inopso GmbH Interoperable Solutions - Offers an IFC-Interface for Architectural Desktop, which allows to exchange architectural data according to IAI standards. - http://www.inopso.com/
AB Studio - CADCON is an extension to AutoCAD or Architectural Desktop for structural and building services design. - http://aec.cadkon.cz/
Roof Builder Tools - A 3D roof modelling shareware for AutoCAD. - http://www.roofbuildertools.com/
Design Master Software, Inc. - HVAC and electrical building design and drafting software for AutoCAD. - http://www.designmaster.biz/
Computer Services Consultants Ltd. - Manufacturers of the 3D+ parametric 3D structural modeling and drawing application with integrated analysis and design. - http://www.3dplus.info/
Survey, Cogo and Drafting - Surveying, coordinate geometry, digital terrain modelling, and drafting applications for Intellicad and AutoCAD, as well as free autolisp routines. - http://www.cogosoftware.com/
LTplant - Electrical, instrumentation, and plant design software for AutoCAD LT, with isometric drafting and BOM functionality. - http://www.ltplant.com/
Cad Easy Corporation - AutoCAD extensions EasySite for terrain modelling and visualization, and EasySurf for mapping and road development, as well as related symbol libraries. - http://www.cadeasy.com/
ArchSoft - A 2D application program for AutoCAD and IntelliCAD for producing architectural working drawings. - http://www.grovetec.com/
AC Plant Designer - A plant design and construction toolkit connecting AutoCAD with database functionality. - http://www.acplant.com/
FireAcad Design Software - AutoCAD extension for fire sprinkler designers. The program aids in design, hydraulic calculations and material listing. - http://www.fireacad.com/
ArchSymb - Architectural symbols and routines for AutoCAD [requires Javascript for navigation]. - http://www.archsymb.com/
InAdire Teknik - Free and commercial AutoCAD LT and MicroGDS add-ons for drawing reinforcement bars and insulation. - http://www.inadire.se/
ATG CCM Plus 2000 - Software for accessing and editing facility management data in AutoCAD with an integrated MS Access interface. - http://www.ccmplus.com/
GlobalCAD - Offers general drafting tools as well as LandARCH, a landscaping application for AutoCAD. - http://www.globalcad.com/products/index.html