ObjectDCL An interactive replacement of the DCL language for developing dialog boxes within AutoCAD, sold online. http://www.objectdcl.com/

AutoCAD Developers Group Europe A non-profit association of software developers who are working on applications around AutoCAD. http://www.adge.ch/

AJaX - the AutoCAD/Java eXtension An open source project to integrate a Java2 VM into AutoCAD and to provide the necessary interfaces and class libraries. http://www.brainon.ch/AjaX/

xarch AutoCAD Info and Tools A resource for AutoCAD developers, including an AutoLISP standard library and the AutoLISP FAQ, as well as code examples in AutoLISP, ADS, and ARX. Visitors can add information in an AutoCAD Wiki. http://xarch.tu-graz.ac.at/autocad/

Ransen's ObjectARX Course A multimedia based tutorial on programming ObjectARX on CD-ROM, with three of 20 chapters downloadable as a demo. http://www.ransen.com/cadcourse.htm

OpenDWG Alliance An association of CAD customers and vendors committed to promoting Autodesk's AutoCAD DWG drawing file format as an open, industry-standard format for the exchange of CAD drawings. http://www.opendwg.org/

AutoCAD Exposed Information about undocumented features of AutoCAD, such as commands, system variables, and functions of the ADS, ARX, and AutoLISP programming interfaces. http://www.manusoft.com/Resources/AcadExposed/index.stm

ARX LT SDK An extension to AutoCAD LT to enables the ObjectARX API as with the standard version of AutoCAD. http://www.cadaware.com/

Py_acad A free software module that makes it possible to extend AutoCAD with the Python programming language, in a similar way as with AutoLISP. http://pyacad.sourceforge.net/

AfraLisp Dedicated to the study of AutoLisp and VBA together with AutoCAD, including tutorials about both languages. http://www.afralisp.com/

CadJobMart Job listing related to AutoCAD within the USA and sometimes beyond. http://www.cadjobmart.com/Autocad/home.html