PixelofInk.com and BookBub.com both feature daily lists of free and bargain Kindle books. Additionally, the Amazon website features a free e-book category, mostly filled with classics.
While it is possible to see the lists of free e-books on BookBub without signing up for the site, doing so allows the user to customize favorite genres and authors and receive daily emails with book suggestions.
Pixel of Ink posts book lists on the sites Facebook page and blog throughout the day. Like BookBub, the site also features a free email list. Once a day, it sends out a list of the books featured that day.