Dual-osc wavetable synth
Sound designer Armin Kujat (aka Kujashi), who has contributed a sound-bank with 64 wonderful patches (included in the zip file) has this to say about Constructor:
A new pearl in the software synthesizer-world...
With Constructor you can create a wide range of additive pads, leads, basses, sequencer-sounds and acoustic-like plucks and instruments with a special character. The Effect-unit enriches the sound with a special timbre from short shutter-echoes, spring reverb-like up to atmospheric, textural delays.
Constructor is available in both 32- and 64-bit VST versions!
Note there are two versions of the .fxb file for Kujashi's sounds, one for the 32-bit version and another for the 64-bit version. Small differences between the two require that we have two separate files. Make sure to load the correct one.