AEC
Eagle Point, Asuni CAD

Block Managers
AutoLib, CAD fx, CSI

CAM
NC Polaris

Civil Engineering
Eagle Point, MX, Survey, Cogo and Drafting

DWF Tools
Autodesk DWF Writer, AutoDWF, Bluebeam, DWFmaker, Net-It

EDM/PDM
CADlock, CAD Manager, Project Center, Synergis Adept

Electrical and Electronic
VIA, USCAD

Facilites Management
Graphstore

General
CADwerx, Furix, TC Fonts, Zak Morris Company

Hatch Patterns
AHatch Pro, AutoCADHatchPatterns.com, HatchPatterns.com

HVAC
CADPIPE, Ducting Inventor,   Mech-Q, MagiCAD

Landscape
Irrigation Design, ViaCAD 2D/3D

Layer Tools
AutoLayer, LayerTrans

Mechanical
3DPowerTools, AutoSolids, EMT Software, GrafiCalc

Miscellaneous
CadCARD Slidechart, Cadre Systems, Draftsman, VP HybridCAD

Output
output to graphic files, PDF output, printing and plotting

Parts and Symbol Libraries
EMT, Fast/Design

Piping
CADPIPE, CADWorx, Mech-Q, PipeDesigner 3D, PlantWise,

Programming
DCG, ObjectDCL 

Sheet Metal Design
Radan, SPI

Structural and Steel Detailing
DetailCAD, HyperSteel, Steelware

Visualization
AccuRender, InteriCAD