This is a great time of year if you’re in the market for themes, plugins, or webhosting. Black Friday is the day after Thanksgiving where many retailers offer deep discounts. In the past 2-3 years, WordPress businesses have done the same by offering substantial discounts for plugins and themes.
WPLift has a great roundup of deals covering themes, plugins, and webhosting. Several companies are offering 50% off themes and memberships. WP Mayor also has a collection of black Friday deals. Keep in mind that many of the deals and coupon codes will expire this weekend. If you have an offer not listed on either site linked above, tell us about it in the comments.
I have a list going at http://www.donnafontenot.com/wordpress-black-friday-deals-2014/ which has a few not shown on either of the lists you’ve mentioned.