I am very happy to have added Omnisphere by Spectrasonics to my "rig." Here's some info about it from the company's website:
After many years of development, Spectrasonics is proud to release the brand new flagship virtual instrument Omnisphere.
This epic ‘Power Synth’ breaks completely new sonic ground by combining
a wide variety of hybrid realtime synthesis techniques, an epic library
of remarkable ‘Psychoacoustic’ sounds, and many innovative features
that have never been seen before in any hardware or software
synthesizer. The new instrument is the first to be based on
Spectrasonics newly developed STEAM Engine.
Omnisphere offers a host of hybrid synthesis and new control capabilities including Variable Waveshaping DSP synthesis, Granular synthesis, Timbre Shifting, FM, polyphonic Ring Modulation, high-resolution streaming Sample Playback, Harmonia™, Dual Multimode Filter structure, Chaos Envelopes™, an advanced Unison mode, and the innovative Flex-Mod™ modulation routing system - to name a few.
The huge core library of Omnisphere is filled with years of creative sampling experiments and thousands of inspiring patches. Spectrasonics has pioneered several brand-new types of sampling for the core library of this instrument, including unique “Psychoacoustic” sounds and soundsources created with a new Composite Morphing Technique (CMT) - which morphs the harmonic characteristics of one instrument to another. As a bonus, a section of the core library is also devoted to representing the best of Spectrasonics award-winning sample libraries. When all of these organic core library soundsources are combined with the synthesis power of the STEAM engine, the sounds become “alive” in a truly dynamic and expressive way.