Synapse Audio - DUNE 2 v2.5 OS X
 

DUNE 2 was rewritten from scratch, in order to provide a yet higher sound quality and allow for an even wider range of sounds. New oscillators, new filters, new effects and graphical envelopes are just some of the new additions.
With a maximum reserve of 8320 oscillators at full polyphony, DUNE 2 is a true unison monster, unlikely to ever run out of oscillators.
DUNE 2 is available as 32-/64-bit VST/AU plugin for Windows and Mac OS X.

DUNE 2 features summary

VA, Wavetable and FM Synthesis
Two oscillator stacks with 32 oscillators each
Third oscillator and noise generator
8x Unison = up to 520 oscillators per note!
16 voices of polyphony = up to 8320 oscillators total
Full version comes with more than 400 patches
Zero-delay feedback filters
Four graphical envelopes (MSEG)
Three low-frequency oscillators (LFO)
Modulation matrix for synth and FX parameters
Two Master FX busses with 9 high-quality effects each
Innovative Arpeggiator with MIDI file import