Some say Vital is the “Serum killer,” but I think the two can coexist peacefully. There’s a free, entry-level option that will probably get you mostly sorted, but if you want some cool additional features and to support the developer, Matt Tytel, then consider a subscription for one of the paid tiers.
Vital is a spectral warping wavetable synthesizer. From the developer:
Discover how warping the harmonic makeup of a wavetable can completely create a new set of sounds. Stretch, shift, smear and skew harmonics up, down and around the spectrum to explore new timbres and create sounds you didn’t think possible with wavetables.
Screenshots
Review by Venus Theory
Check out this awesome in-depth review by Venus Theory. Note that this was recorded shortly before public release, so there may have been some changes in the meantime.
