The stuff they make is nicely priced (Synthpack $65) and they have a free bundle too. It runs in the FREE Reaktor.
https://www.toyboxaudio.com/pages/synth-pack-details
Synthpack has the Piano roll, FM synth (Thru Z or Phase/DX7), Granular, Analog, Supersaw w FM, Sample Player, etc...
This is like Step Sequencer, Complex-1, Poly Sequencer, Diva, Snap-Heap, Phase-Plant, Serum, etc all in bits and pieces. Downside is you need to build your own synth, upside is when you have built it you can use it to make new patches.
Really cool, though I'm not sure if I want to spend time building synths, but there might be some cool innovation here.