While G-code is theoretically a standard, most machines have their own dialects. To get over this, SheetCam comes with a wide variety of post processors. These can be fine-tuned to produce code for virtually any machine. Unlike many CAM packages the post format is freely available and documented. If you so wish you can create your own posts. The programming language used is versatile enough to cope with pretty much anything you could possibly want a machine to do.
Custom posts can be written to your specifications. This service is normally free unless the post is particularly complicated. Some examples of specialist posts include machines with multiple heads, say a plasma cutter with a pucnch marking head.