Some recent things you might want to check out:

Psycho Circuitry has released free versions of their MICRO XFORMER+ saturation & MINI OPT+ compressor
https://psychocircuitry.com/mxf.html
https://psychocircuitry.com/mini-opt.html

Reflex Audio has a free version of the automatic dynamic compressor - https://reflex-acoustics.com/products/automaticlite

NI is offering a free Audience Chori Kontakt instrument for a limited time - https://www.native-instruments.com/en/products/komplete/vocal/jacob-collier-audience-choir/

Muze Audio is giving away 12 free instruments for a limited time - https://www.waya.deals/en/coupon/muze/1_products.php

Freeware beat grid synced true peak sidechain oscilloscope from Audija - https://audija.com/plugins

VoS has released an updated version of their free utility plugin - https://varietyofsound.wordpress.com/2024/02/26/prefix-version-1-2-released/

Free Transpanner 3D and stereo plugin from Artists in DSP - https://artistsindsp.com/products-2/