Sirius Systems Corp.  
   NC Verify graphically simulates the material removal process to detect program errors for milling, grinding, turning, and wire EDM machines.
   http://www.siriussys.com/

Vericut NC Verification Software  
   Vericut NC verification software simulates, verifies, analyzes and optimizes NC tool paths. The program reduces NC errors and speeds manufacturing time.
   http://www.cgtech.com/

Discriminator CNC editor.  
   Discriminator makes CNC files more readable for viewing and printing by allowing the user to format individual codes with any font or color.
   http://www.cncedit.com/

EditCNC  
   Edit CNC has the features needed by CNC programmers for editing CNC G-code files, as well as all the basic applications found in a text editor.
   http://www.editcnc.com/

NC Postprocessors  
   Custom NC Postprocessors for popular CAM systems
   http://www.postprocessors.com/

Ascendant Technologies  
   offers graphical G-code verification and CNC and DNC software, including eXtremeDNC and XYZPRO32 Edit Plus.
   http://www.ascendtec.com/

Soft Sqad Software  
   CodeShark is a hybrid G-code programming, editing and DNC program with an integrated CAD system. Free lite version and other free software also available.
   http://www.softsqad.com/

i-logic Software  
   CNC editing and verification software.
   http://www.i-logic.com

Cimskil High Throughput Manufacturing  
   Cimskil High Throughput Manufacturing Systems including NCv, MetCAPP, and CUTDATA.
   http://www.cimskil.com/

OSS  
   Software for the sheetmetal and machine shops specializing in G-Code translation, NC control, estimators and calculators.
   http://www.tcsn.net/oss/

ATD EDIT  
   A text editor made to write and modify complex CNC G-code files, with syntax highlighting and task specific editing functions.
   http://www.atdedit.com/

CutViewer  
   A program that simulates 2 to 3 axis CNC machines using solid modeling, with collision detection and estimation of the machining time.
   http://www.cutviewer.com/

N/C Software, Inc.  
   Developers and distributors of numerical control programming products.
   http://www.ncsoft.com/

CNCTrans  
   Shareware application for G-Code editing and RS232 file transfer between PC and CNC controllers.
   http://cnc.htmlplanet.com/

Armchair Machinist Software  
   Machine Shop for Win95/98 including a variety of common calculations and database information.
   http://www.armchairmachinist.com/