Check out some of the latest MakeUseOf discoveries. All listed websites are FREE (or come with a decent free account option). No trials or buy-to-use craplets. For more cool websites and web app reviews subscribe to MakeUseOf Directory.

(1) ThoughtAudio – This website lists cool collection of free audio books. The collection consist of books from classic literature, history and philosophy, and includes well known titles such as The Call of the Wild, Sidhartha, Metamorphosis”¦ etc. You can browse books, listen to them online and download the ones you like as an mp3 file. Read more: ThoughtAudio – Lots of Free Full Audio Books

(2) SimplePassword – Free online service that lets you generate strong and unique passwords for different accounts from a single master password. Read more: SimplePassword – Generate Unique Passwords

(3) Unlinker – Firefox add-on which can convert image links and thumbnails on any webpage into full images, so you do not have to click each one individually and open on separate window. Read more: Unlinker – Quickly See Full Images Behind Links or Thumbnails

(4) ScienceBooksOnline – Directory of free science ebooks in different subject categories like Astronomy, Biology, Math and others. You can browse ebooks by category and read them for free online or download in PDF format. Read more: ScienceBooksOnline – Free Science eBooks

(5) LTLPrints – Innovative website where you can create huge and quality custom wall graphics. It provides a design tool with instructions which helps users design own wall sized prints. Read more: LTLPrints – Create Custom Wall Sized Prints

These are just half of the websites that we discovered in the last couple of days. If you want us to send you daily round-ups of all cool websites we come across, leave your email here. Or follow us via RSS feed.