Books are meant to be shared, so why not share your personal favorites with others around the world? LibraryThing makes it easy to do just this, and visitors can catalog their books online here after creating a profile. After entering their books, visitors can offer their own sage wisdom on each title, and cross-reference their thoughts with others on the network who have read similar titles. Visitors can take a virtual tour before signing up, and there's also a series of discussion boards. Users can catalog their first 100 books at no charge, and LibraryThing is compatible across all platforms, including Linux.