BookCrossing:Encourages readers to read, register, and release books for others to enjoy. Includes a way to track books released, add journal entries and reviews, and search for books in the wild.
Book Relay: Various BookCrossing related utilities, including BookRelay, another way to trade books.
Bookcrossing Journal: An online journal to record readings, mainly of books received from Bookcrossing.com. Contains reading lists, reviews, news.
BookCrossing Meetup: Search for groups of local BookCrossers who gather to meet monthly.
BookCrossing Web Ring: Brings together various websites around the world dedicated to providing additional resources for members of Bookcrossing.
BookRayGirl - Book Rays Central: Tracks open book rays and rings for BookCrossers who do not regularly monitor the forums. Encourages sending books overseas.
Cliff1976's BookCrossing Projects: Includes a wish list BookCrossers can use to track the books they want and a tool to create bookshelf hit reports.
Jazzy7112's Successful Release Locations: Lists locations in the United States and Canada where BookCrossers have had successful releases.
Lythe's BookCrossing Labels: Templates for labels and bookmarks from a BookCrosser in North Dakota.
macdonv's BookCrossing Page: Personal site describing Heather Macdonald's involvement with BookCrossing. Includes book log and label ideas.
Nyisutter's BookCrossing Pages: Includes a list of official crossing zones, BookCrossing-related sites, book-related geocaches, and the BookCrosser's current book rays. Also includes templates for labels, flyers, and bookmarks.
RinaldiWeb's European BookCrossing Support: Offers templates for labels, flyers, cards, and stamps. [Dutch, English, French, German, Italian, Portuguese, Spanish]
Saffista's BookCrossing Resources: Links to labels, bookmarks, and flyers from a BookCrosser in Indiana.
Special-K's BookCrossing Labels: Templates for labels, handouts, and bookmarks from a BookCrosser in Australia.
Stumble Upon: Bookcrossing: Discussion and links exchanged with BookCrossing people who are also on Stumble Upon.
TexasWren's BookCrossing Hints: Extensive FAQ, forum, list of BookCrossers' birthdays, special day calendar for themed release ideas, and a list of favorite books.
The Wheelbarrow Project: Weblog about a project to leave a wheelbarrow full of books in conspicuous places.
Yahoo! Groups: BookCrossing Australia: Resources and discussion for Australian bookcrossers.
Yahoo! Groups: Bookcrossing Ireland: Mailing list for BookCrossers in Ireland.
Yahoo! Groups: BookCrossing Reading Group: Mailing list for reading and discussion group of BookCrossers.
Yahoo! Groups: BookCrossing UK: Mailing list for BookCrossers in the United Kingdom.
Yahoo! Groups: Malaysian BookCrossers: Mailing list for BookCrossers in Malaysia.