DPlot

I see that the basic command to do an FFT only works when you have evenly spaced data. I was curious if there were any other functions that allow you to take an FFT of unevenly spaced data.

No, sorry. The FFT routines used by DPlot don't use your X values at all - a constant spacing (typically some time step) is inferred. All FFT algorithms I'm aware of work the same way, operating only on the amplitudes and assuming a constant spacing.