Eagle does have a very usefull ULP called "length-freq-ri.ulp" where it automatically calculates tracks length, resistances etc.
Now, it would be great if an ULP (or any other piece of software) could calculate capacitances between tracks. It would be a great tool to better pcb designs, specially when dealing with high-frequency.
I know real world the values would be dielectric/coating/etc dependent but relative values would already be very helpfull.
Does such a tool exist? I've searched a lot looking for it but can't find anything.