In the mood for a funny, beautiful, demanding, short book? Or maybe a sad, gentle, unusual, down-to-earth book? You select the qualities you want in your next book and Whichbook produces a list of titles to choose from, along with short reviews. Try it!

LibraryThing allows people to register for free and catalog their books using simple tags. The BookSuggester lets visitors enter a book they like and find similar books based on how others have tagged these books.

Lesson plans, activities, and educational materials on life science, geography, and earth science under the educational resources tab.

All Consuming lets you build an online catalog of your favorite books, movies, music, and more; share your opinions about these books, films, songs, and other media; than get suggestions from others as to what you should “read, watch, or eat” next.

Find new authors, music, movies, or people based on what you know you like. Creates weblike maps for your favorite bands, with the names closest to the center providing the best match. Also creates maps for books and movies.