Domcomp - No-nonsense domain price comparisons, updated daily
Goodreads - See what your friends are reading.
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.
LibraryThing - A home for your books.
Pricepeek - Compare prices of the same product across all Amazon locales
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.