Changeling Press has a "Spotlight" feature on the three Rose & Thorne books, and they're all 15% off! If you haven't picked them up yet, now's the time to do it!
They are, in reading order:
Shibari Auction House: Tony is also 15% off because it's a new release!
Dreamspinner Press has a Valentine's Day sale going on -- 25% off all books until February 15. This includes Cupcakes, The Swag Man Delivers, and the pre-order of Guarding January! Even the paperback of Guarding January is on sale.
Torquere Press has a coupon for 15% off that's good through to the end of February! The code is sweetheart2015 and it's even good on the pre-order of Radio Boys!
Edited to add:
Totally Bound has all BDSM titles at 25% off for the weekend (starting today!) That's all my titles with them!
smut fixes everything