TurboCNC

This is a robust, efficient CNC interpreter for driving machines with up to 8 axes of motion.
It is fully configurable step/direction or direct phase outputs - compatible with MaxNC (not the closed loop type) and HobbyCNC boards, Geckodrives, and all types of Camtronics drives.

Canonical RS-274D g-code - works with CAM programs such as DeskEngrave, VectorCAM, ACE converter and others.
Built-in code editor - stop and re-start anywhere in a program.
8 axis simultaneous motion, any mix of angular or linear with backlash compensation and straight IPM/IPR and inverse feed modes.
Configurable IO for reversible and speed control spindles, E-Stop, home, limit, block hold, coolant pumps, clamps, digitizing probe, jog encoders, and PLC's
Fully parametric programming, with variables, subroutines, and expressions.
Linear, circular, and helical interpolation using IJ or R notation.