Topaz have various products for sale around half price this weekend. Check out their website for details.

I just bought AI Gigapxel (the very impressive up-rezing software discussed in a couple of threads here) for US$75, and the new AI Clear - essentially a replacement for their DeNoise plugin - for US$45.

Topaz products are sold with a lifetime licence. Once you buy them, you can use them forever, and you get free lifetime upgrades. That is the good news.

The bad news is that they don't maintain them forever: every now and then they invent a "new" product that does the same job, so you have to buy the new one if you want the latest features. So it isn't really free lifetime upgrades at all. For what you get, Topaz a bit expensive really. But if you buy on sales days such as this weekend, you can cut that cost right back to something very reasonable.