Bookulous!

See what your friends are reading. Keep track of what you've read and organize your books into virtual bookshelves. Join a book club to discuss your favorite books. A better way to find good books to read!

LibraryThing is a cataloging and social networking site for people who love to read. It allows users to easily create their own catalogs of books that they have read, own, or would like to read.

At launch, pppulp compares prices from Amazon, The Book Depository, Wordery and eBay sellers. Search results are tailored to you, so whether you’re from Australia, USA, Singapore or the UK, prices will be shown in your local currency.

Quick book recommendation site.

Store your DRM-free e-books, organise them into reading lists, and discover great new titles with Libreture. All for a small monthly fee.

BooksReddit is Reddit book recommendation aggregator. It lets you discover most popular books mentioned by people for different subjects.

WikiMentions lets you discover books/people/videos mentioned by great people. It’s a graph of mentions where people mention other people/books/videos in books/videos. Also it’s a wiki so anyone can add content. We already have around 2200 books and 1250 videos of 980 people. You can add content without signing up. You only need to sign up to edit or delete something.

Booknshelf is a platform for discovering great books and entire bookshelves shared by others. Join up with your friends and see what they're reading while building your own bookshelf to share. Easily keep up your own books organized as well.