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- Siemens NX - high end, windows, possible on mac
- Solidworks - high end,
- Fusion 360 - fully featured, free
- Onshape - fully featured, free, browser based, platform independent!
- FreeCAD
- TinkerCAD
- OpenSCAD
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- the list goes on. As long as you end up with a .stl file of your 3D object, you're fine!
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- SRP Player - came with the Roland, simple but can get the job done. Hard to customize, fairly easy to get going.
- NX CAM - integrated CAM solution in Siemens NX, requires more super user skills. Much customization and control
- Kiri:Moto (Onshape plugin) - Free! Plugin for Onshape. Roughing, finishing and drilling operations available as well as some other customization options
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This website can quickly show you a visualization of your g-code 
CNC:
- VPanel - is the computer software used to communicate with the Roland MDX 540 milling machine we have