You can read Kindle books on your computer, tablet, or mobile phone with Kindle reading apps. The best way to search for FREE books is by going to one of the sites listed below.
JungleSearch is a search engine designed for searching at Amazon. The link is for the USA search, but they also have a search engine for France, Germany, United Kingdom and Canada.
AuthorMarketing Club- monitors Amazon (USA) for daily free ebook offerings. The amount listed varies from day to day. They do offer genre selection.
BookGoodies monitors Amazon (USA) for limited time free ebooks offerings. They list several free ebooks daily and have an individual description of each ebook.
DailyFree ebooks UK monitors Amazon (UK) for its daily free offerings. They offer genre selection as well as sorting by time (including since your last visit). They also offer free listings from Smashwords, which can be viewed with the Amazon offerings, alone or not at all (Amazon only). They have over 6,000 free ebooks listed.
You can download a Kindle reading app for free HERE.