XYZBots
Welcome to XYZBots, working to provide Free Software for motion control systems while gaining interest in robotics.
Also, available for hire; facility design, process development and software development
Try Millcrum
http://millcrum.com - make sure you trust your ISP and that you are using a secure local network (another SSL certificate is not in the budget), or just grab the Millcrum source directly at https://github.com/andrewhodel/millcrum.
It requires programming knowledge, but if you are looking to create parts from sheets of material it is an ideal tool.
RepRapWeb - for 3d Printers
A Web Based 3d Printer Controller for RepRap and other 3d Printing Systems which runs locally without cloud dependencies.
Includes CuraEngine and Slic3r for STL -> GCODE Conversion without ever having to leave the browser.
GRBLWeb - for CNC Machines
A Web Based CNC Controller for GRBL that runs locally without cloud dependencies.
Integrated CAM for SVG -> GCODE Conversion with Jscut.
Support
RepRapWeb and GRBLWeb are both still Beta software, you can find more information on helping with development/documentation on Github or at the mailing list.
Find support for and other users of GRBLWeb/RepRapWeb at the mailing list/support group - https://groups.google.com/forum/#!forum/xyzbots-support