Advanced Geospatial Solutions  www.advancedgeospatial.com Offers technology to display and manipulate 3D CAD and terrain models, designed to be embedded into GIS, CAD, technical documentation and e-learning applications.

Building Block Software  www.buildingblock.com Provides no-cost C library source code for 2D and 3D geometry operations, boundary offset, area booleans, milling and turning toolpaths.

Cadmai Software GmbH  www.cadmai.com Cadmai ist a parametric and relational CAD module that can be integrated as a intelligent viewer in other applications.

Calligraphic Interface for Tridimensional Surface Modeling  virtual.inesc.pt/~tfdc An educational project trying to develop a gesture-based interface for 3D modeling. It uses wxWindows, ACIS, OpenGL and DevIL.

Component Ingenuity, Inc.  www.componentingenuity.com DWGDOMlib and DXFDOMlib modules for reading and manipulating DWG and DXF files from within .NET applications.

CurveTrainer  www.pml.co.jp/cvt/index.html A basic experimental lab for geometric shape processing, for learning about the mathematical theory and practical manipulation of various parametric curves.

C4W  www.c4w.com Offers modelling kernel libraries and related tools for construction, analysis, and presentation of 3D models.

D-Cubed  www.plm.automation.siemens.com/en_us/products/open/d-cubed/index.shtml Supplies geometric constraint managers, hidden line and collision detection components to the CAD/CAM industry.

DeveloCAD.com  www.develocad.com Graphics libraries for Delphi developers, such as an OpenGL canvas, hidden lines algorithms, and geometry data management.

DInsight  www.dynoinsight.com KernelCAD is an embedded CAD software, which adds interactive 3D solid modeling functionality to any Windows application.

Gardos Software  business.hol.gr/gardos Avax ActiveX control to view, create, edit, print, and manage 2D vector drawings.

Geometry Handling Library  www.pml.co.jp/ghl/index.html A library for 2-D and 3-D geometric calculation in C, with functions for shape generation, geometric evaluation, intersection, and offsetting and filleting.

IntegrityWare, Inc.  www.integrityware.com Offers libraries for geometric solvers, trimmed surfaces, and polygon optimization, including visualization features.

KolbaSoft  www.kolba.com The VeCAD 2D vector graphics library can be used to create CAD applications.

Kotem Technologies Inc.  www.kotem.com Offers components for CAD/CAM software, such as the 3D Core CAD-engine, the SmartFit 3D best-fitting application, and related functionality.

LEDAS Ltd.  ledas.com Provides a variational geometric solver for CAD, scheduling, planning and other intellectual solutions, using proprietary constraint-based technologies.

Open CASCADE  www.opencascade.com A 3D modeling kernel that consists of reusable C++ object libraries that are available as Open Source.

Soft Gold, Ltd.  www.cadsofttools.com AutoCAD DXF tools for developers. ABViewer for Windows Commander and Far Manager. 3d DXF viewing and printing with C++, VB, and Delphi.

Spatial Technologies, Inc.  www.spatial.com Develops, markets and supports software components for 3D modeling, visualization, and interoperability, such as the ACIS solid modelling kernel.

VectorDraw Drawing Components  www.vdraw.com Object oriented 2D/3D graphics libraries with AutoCAD file format support, as well as a web-based version.

Weresc  www.weresc.com Offers CADE, a CAD ActiveX control to view and edit 2D vector graphic, with web and DXF support.

Wout Ware  www.woutware.com CadLib is A .NET DXF file manipulation library with 2D and 3D support that also handles export to image formats and PDF.