As every year wordpress community makes a lot of discounts for themes. I decided to collect them all and show to the world, so enjoy them ! Sales like those below are rare, so don't waste your chance.
Here is the list with coupon codes!

Thanksgiving WordPress COUPON CODES - all in one place!

ThemeFurnace

• Use coupon code: BLACKFRIDAY12 for 50% Discount of any Purchase
• Club Membership: $99 : $49.50
• Single Theme: $49 : $24.50

Deals ends Tueday 27th November

WPZOOM

Until Monday, known as “Cyber Monday”, November 26, you can save 33% off on any of our themes or subscriptions using code BLACK2012

Standard Theme

30% off all licenses with discount code BF2012. Ends Mon 26th November 11:59 PM EST.

Theme Junkie

40% off all themes and memberships. Use coupon code BLACK. This special offer is valid to 27 Nov, 2012.

Solostream

20% off all products. Use coupon code 5084BE. Coupon code is valid to midnight 26 November, 2012.

GabFire

50% discount on any theme. The offer is valid to midnight Monday 26th November EST.

iThemes

Get 35% off any iThemes product using coupon code ELF2012. This discount is valid to 31 December, 2012.

Graphpaperpress

Get 30% off with coupon code blackfriday2012. (only 21 Nov 2012). The 30% off Cyber Monday coupon code is cybermonday2012. ( 25 – 27 Nov 2012)

Aloha Themes

Buy one Get One Free. Use coupon code:BOGOTHANKS. Ends 26/11/12.

Tokokoo

75% off all themes and plans. Use coupon code BLACKFRIDAY.