Round-up post now fully updated and pruned (though some of the new stuff has probably expired; however, some stores update the freebies a bit later than others, so you can always check to see which ones haven't reset the price yet).
Today added 2 travel guides, 1 business self-help guide, 1 YA teen travel self-discovery journey, 1 YA Christian fiction, 1 backlist romance, updated 1 YA paranormal romance, and put in a pointer to All Romance eBooks' freebie-a-day Earth Day countdown giveaway.
Non-fiction
Let's Go Europe 2011: The Student Travel Guide by Harvard Student Agencies looks like a condensation of their full-length dedicated country guides.
1936… On the Continent: The Entertaining Travel Annual by Eugene Fodor is a vintage travel guide, offered DRM-free to celebrate Fodor's 75th Anniversary.
The Velocity Manifesto: Harnessing Technology Vision and Culture to Future-Proof your Organization by Steve Klososky is managerial self-help.
YA & Romance
13 Little Blue Envelopes: Free with Bonus Material by Maureen Johnson is a HarperCollins promo freebie to boost sales on the sequel.
Shattered: A Daughter's Regret by Melody Carlson is Christian fiction, 2nd in a series of linked but not plot-dependent books.
Abandoned by Amanda Stevens is now free @ Kobo.
Almost Perfect by Julie Ortolon is a contemporary romance, 1st in her Perfect trilogy, previously published by Signet and now a backlist book from the author at Smashwords and thence to Sony and Kobo.