Marketing is tough. One of the easiest ways to get our names out there is to either deeply discount our books or offer them for free. But just setting a price isn't enough anymore. We need to actively promote our promotions. And for those of us starting out, with few reviews, no budget, or other restrictions, that is not easy.
The following sites offer free or inexpensive options for promoting your work while it is on sale, free, and in some instances, a new release. Just make sure to read the submission requirements. I tried to grab the sites with as few exclusions as possible, but remember, no two promo sites are the same.
I'll add to this list from time to time. If you've got a site you love, either as a reader or an author, post in the comments!