Had to do an 5 axis 3d printer for my school project. Found this :(https://github.com/rcKeith/Marlin) edited it and made it 5 Axis.
Couldn't get the extruder motor and hotend work on reprap ramps1.4
Made a custom start screen.
Even tho hotend doesn't work it shows the temperature and 5 axes at homescreen with a suitable board other than ramps 1.4 it should work but I have no chance to try it unluko.
Also if you are looking for a slicer here is the one i used: https://github.com/Spiritdude/Slicer4RTN example .gcode's are on 'code' page
GL if u will work about this.