Special, because I wouldn't directly use them to make sound alone
They are either meant as modulation sources or in the case of PM Sine as a modulation source and/or to be modulated at audio rate by another oscillator. The PM Sine table is just a sine wave with different phases. Therefore, modulating WT position in the mod matrix will effectively give you phase modulation! Stick this in osc1 and osc2 with osc3 as a sine wave you can get the same configuration as the native FM oscillators. So what? Well, you can go much further than the native FM. For instance, replace osc2 with another wavetable.
The other 2 wavetables are purely for waveshaping. The wavelets one does a fairly interesting fake resonance effect when swept.
I'll try to upload some patches later that showcase the use of these wavetables.
https://app.box.com/s/odboxeh75ah21h2wfxavb99e01rezoal
Edit: make sure the modulation rate is set to audio rate in the settings tab!