I've used KiCad for 2 and 4 layer boards, including RF-sensitive stuff with PCB antennas, worked great. Loved that the component footprint (among other things)

I've used KiCad for 2 and 4 layer boards, including RF-sensitive stuff with PCB antennas, worked great. Loved that the component footprint (among other things) was just readable text, thus I could manually create the traces for the antenna exactly per the TI appnote describing the antenna, which was much easier than making the traces by hand in the editor.