Readernaut - We are a small community of readers, sharing our adventures and supporting each other as we persue a life of learning.
Likewise - Get recommendations you love, from people you know.
LibraryThing - A home for your books.
Alternative Hunt - Learn about great alternative products as you browse the web
Goodreads - See what your friends are reading.
Pliim - One click and be ready to go up on stage and present!