From November 21st through November 28th, Topaz is offering 75% off of all of their traditional plugins in the full Topaz Plugin Collection
The plugin Collection includes 17 Topaz Products including the Topaz Studio versions of Impression, Clarity, Detail and Simplify. (over $1000 individually) for only $249.99. As an added bonus you receive also some useful pro adjustments in Topaz Studio from Impression, Clarity, Detail and Simplify

Here's the link: Topaz Black Friday Sale

Use the coupon code 'BLACKFRIDAY17' to get your 75% discount.

Google Nikcollection is still free
https://www.google.com/nikcollection/