Here are a few non-KDP which are free to all @ Smashwords, probably just for a limited time:
Christie Craig used to be published by Dorchester/Leisure/Love Spell before they imploded. Here's another in one of her old series with them (we got one of the early ones free at some point as an official promo):
Divorced, Desperate and Delicious
Patti O'Shea's paranormal romance novella in the shared-universe Crimson City setting is another refugee from the Dorchester fallout:
Dark Awakening which she says was in one of the printed anthologies.
This is the Julie Ortolon book mentioned in the Harlequin thread, available to all without DRM or differential geo-pricing in the format of your choice if you want it that way:
Falling For You
Some from yesterday's slushpile trawl (not posted): UK author Netta Martin's historical saga:
Tycoon, previously printed in 1993 by Onyx. Perhaps not a dedicated romance, but cover blurb gives comparisons to Barbara Taylor Bradford and Jackie Collins who are popular romance/chick-lit writers IIRC?
An m/m Seattle-set contemporary romance (may have erotic content) courtesy of Books We Love:
Chasing Marty by Jenna Byrnes (small specialty-imprint Phaze-published authors)
Three works (not necessarily all romance) by Mary Nichols, who's been published by Mills & Boon, including one Orion-paperbacked historical romantic suspense from the 1996:
Linkage for the lot
And a pricing-catchup-non-KDP former Ellora/Cerridwen romantic suspense re-written by the author Ann Bruce:
Deadly Fall