I navigated the indicated links and some others.
There seems to be a preference for the use of the Eagle (to draw the schematic and PCB) and its PCBGCode plugin (to generate Gcode). Among some of the PCB design software that I rated, I realized that the Eagle is the most difficult to use, the less intuitive. Unfortunately.
I like Fritzing but it is still a very early stage.
I hope Fritzing to improve the supply of other export formats, as well as resolve compatibility issues of the formats that have (I have tried exporting my PCB Fritzing to the Eagle and I did not succeed).
Thank you.