Nektar who are well known for their hardware controllers have now created their first soft synth and by the looks of it they may be on to a winner.
The synth is called 'Bolt' and this is what Nektar say about it:
Nektar BOLT is the first Harmonics Synthesizer for VST/AU compatible DAW platforms. Its unique Harmonics oscillators will take you from subtle sine waves to overtone-rich pulse chains at the turn of a knob. And BOLT’s user interface encourages instant experimentation when creating sounds. No filter required – it all happens right in the oscillator. Experience the speed of new sounds – literally.
It certainly looks interesting. There are both Windows and Mac compatible demos available for download here. So worth giving it a test run at least?