Universal Audio are offering their Pure Plate Reverb for free until 24/12. This is a VST Reverb plugin for use in your DAW or other music software. You will need a UA account to claim.
I already own this reverb, but UA have given me a 10% off coupon instead by separate email (YMMV).
I have not used this particular reverb, but all of the UA plugins are high quality.
Happy festive season all
Title was edited to suggest it requires UAD hardware. It does not, as it also runs in native mode as a standard plugin.