Here are the audio plugins I've been making, 3 of them are free.
- Graillon is an octaver that changes clean voice into growl:
- GFM Psypan is a free binaural panner for making sounds jump out of the head:
- GFM Koch is a minimalistic physical synth for xylophone or sub-bass sounds:
- GFM Distort is a digital saturation with a bit of 90s flavor:
I try to take great care of signal cleanliness, for example in GFM Psypan 64 point interpolation is used so that basses survive the delay, GFM Distort uses 16x oversampling, and so on.