Right before they were acquired by Meta, the ERA6 team made their VST plugins free to the world. They're no longer available on the website because of the acquisition, but they are thankfully not lost forever.
Matthias Ott has a writeup at https://matthiasott.com/notes/free-audio-plugins-accusonus-era-6-bundle and links through to the internet archive which I've also preserved here for my own reference: https://archive.org/details/accusonus-era-bundle-v-6.2.00