Alexander KosovSave
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
Cad Easy CorporationSave
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/
KLH Software, Inc.Save
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/
LTplantSave
Electrical, instrumentation, and plant design software for AutoCAD LT, with isometric drafting and BOM functionality. http://www.ltplant.com/
MillLister, Inc.Save
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/
SYCODESave
Offers terrain modelling software for AutoCAD and as a standalone product, as well as general meshing software. http://www.sycode.com/
Struc PlusSave
Suite of parametric driven modules that provide tools and macros related to the preparation of structural engineering drawings. http://www.struc-plus.com/
Trace SoftwareSave
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/
drcautoSave
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/