Windows based real time CNC control supports ISO programming and the HPGL format.
http://www.trimeta-software.com/
Machine Shop for Win95/98 including a variety of common calculations and database information.
http://www.armchairmachinist.com/
Online 2D/3D parts library hosting, integrated with PTC Wildfire and the ability to do Parametric searches. Formats include PRT, DXF, IGES, DWG.
http://www.catdas.com/
The EZ-CAM product line includes complete CAD/CAM software solutions for NC programming of Mills, Lathes, EDM and other CNC equipment.
http://www.ezcam.com/
Engineering Geometry Systems Products FeatureCAM, an advanced CAM software package
http://www.featurecam.com/
The RoboCAD family of products, which includes drawing, drafting, solid modeling, and numerical control applications.
http://www.robosys.com/
CAM software for mills, lathes, wire EDMs, and 2-axis machines.
http://shopcam.com/
Windows-based DNC software for Haas CNC and most other machine tool controls.
http://www.dncsoftware.com/