Sonic Academy is giving away the JU-60 chorus plugin for free throughout November in an early Black Friday deal.
(https://www.sonicacademy.com/event/ju60-free)

Audio Plugin Deals are currently offering the Mixbox SE effects suite from IK Multimedia, for absolutely free for the next few days.
(https://audioplugin.deals/product/mixbox-se-by-ik-multimedia/ref/176/)

Ewan Bristow launched the Florah (LITE) plugin, a dynamic processor he describes as a free alternative to Wavesfactory’s Trackspacer.
(https://ewanbristow.gumroad.com/l/FlorahLITE)