About.com Crossword Puzzles: Offers reviews and information about several puzzle sites.
Aquarium Fish Crosswords: Fish-themed puzzles to print and solve.
Australian Crossword Club Site: Offers word lists, anagrams, and a monthly club magazine.
Beat the Champ: A scrabble-style crossword puzzle.
Brian Jacques: Redwall Crossword Puzzles: A collection of themed crosswords based on British author Brian Jacques's Redwall Abbey.
Canopia Crosswords: A variety of crosswords along with other word games.
ClueMaster: A collection of puzzles available to solve online or download. Fee required.
Crossword Puzzle Games: Offers thousands of puzzles ranging in size and difficulty. Site also offers a creator and a solver.
Crossword Puzzles: Offers many types of crossword puzzles, creation software, and solving tools.
Crossword Puzzles: The Complete Guide: Offers free puzzles to solve, tips for creators, a history, and links to other related resources.
Crossword Station: Offers free themed puzzles to play online or print and solve.
CrosswordLinks.com: A comprehensive resource with rules and helpful tips, articles, software, forums, and information about leagues, tournaments and online play.
Crosswords, Word Puzzles and More: Free daily puzzles available to print out and solve.
Crosswordsite: Both American and British English styles graded from easy to hard for solving online or on paper.
csmonitor.com - Play on words: Discussion about the documentary movie 'Wordplay' which shows how people from different walks of life relate to crossword puzzles.
drawAblank software: PuzzleGetter: Utility to download crossword puzzles from various newspapers in AcrossLite format. (for Mac OS X)
Guardian Unlimited Crosswords: Paid crossword subscription site with puzzles that can be solved online or printed out.
Harry Potter Crossword Puzzle: 140 themed clues that cover the first three books.
I Love Crosswords: Hundreds of downloadable crosswords available to paid subscribers.
MacNamara's Band Inc. Crossword Puzzles: Available to download and solve using Across Lite software. Custom puzzles are also available.
Monograph on Crosswords: An instructional and philosophical essay by an enthusiast.
Peter & Penny's Crossword Puzzles & Quizzes: Available to print and solve.
Puzzle Choice: Offers online and offline versions. Includes different styles such as alpha-cross, cryptic, and codeword.
Puzzle.TV: Subscription-based site with new puzzles daily. Also has word search, codebreakers and cryptograms.
Puzzlers Cave: Free cryptic and themed crosswords to print or play online. Also offers a creation tool and forums.
Scientific Crosswords: A collection of themed puzzles to download and solve.
Sloth2Toed Puzzle Page: A collection of puzzles from a variety of sources. Includes standard, acrostic, and daisy chain.
The Crossword Centre: A resource guide with links, books, software, and a collection of interactive and downloadable puzzles.
The New York Times Crosswords & Games: The daily crossword puzzle with four ways to play, plus free classic crosswords and trivia quizzes. Subscription required.
The Puzzle Society: Paid subscription site offering online and offline versions of daily, weekly and monthly puzzles.
The World's First Crossword: Read about and solve crossword by Arthur Wynne, first published in the New York World in 1913.
Tidbits Puzzles: A collection of tidbits style crosswords.
Times Online: Offers paid subscription to weekly and monthly puzzles from The Times and The Sunday Times.
Wordfinder: Creation, solving and drafting software available on CD-ROM. Also offers partial word search assistance with wildcards.
XWord - Crossword Compilers: A collection of various styles of puzzles by Anina Roux and her team, compiled for magazines and newspapers in South Africa.
Xwords.co.uk: Play online or print and solve. Also offers creation tool. Registration is free.
Yahoo! Games: Crossword: New puzzles daily, archived for two weeks. Free registration required.