Serum - VST for FL Studio, Ableton Live, and many other VST supported DAWs. Heavily utilized in EDM.
MAutoAlign by Melda Production - The ultimate phase cancellation solution. A must-have for every mixing engineer!
Surge XT - Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.
MFreeformPhase by Melda Production - A powerful audio utility that lets you adjust the phase of individual frequencies however you like.
Omnisphere - Piano, pad and synth VST for DAW's.
Voxengo PHA-979 - Track phase alignment audio plugin. Allows you to time- and phase-align any sound material to achieve better sonic coherence and clarity in the mix. Includes multi-band correlation meter.