Cryptograms

Literary Cryptograms - Collection based on literary passages, both general and with specific sets from William Cowper, Jane Austen's Persuasion, Plato's Phaedrus. Includes browser-based solution and solving instructions.
http://www.mirror.org/crypt/

Cryptogram Corner - Daily puzzles and past archive. Has links to other subject related sites.
http://www.geocities.com/cryptogramcorner/

Cryptogram game - Browser based solver. [Requires Flash 6]
http://teppo.tv/cryptogram/

OneAcross - Cryptograms - Solving tool through web browser. Allows entry of a phrase, or selection from "easy, medium, or hard" quotations taken from the Linux fortune collection. Also features the ability to send cryptogram-encoded messages via email.
http://www.oneacross.com/cryptograms/

American Cryptogram Association: Crypto Drop Box - Sample journal issue, links to member homepages, subject-related graphics, subscription information, and resources.
http://www.und.nodak.edu/org/crypto/crypto/

Cryptic Quoter - Functional online cryptogram machine and solver. Has wof and buster extra features.
http://www.gootar.com/cryptic.html

Copycreate.com Cryptoquote/Cryptogram - Daily cryptoquotes, and archive. Has browser-based helper form.
http://copycreate.com

CRpuzzles - Collection with browser-based solver tool. Includes hints. After deciphering the hidden quotation, solvers must derive the author's name from the cipher-quote letter pairs to complete their puzzle task. [Requires Java]
http://www.crpuzzles.com/crypto/

Cryptographs - Puzzles featuring a portrait of a famous person and an encrypted quotation of its source or subject.
http://www.cryptograph.com/

Edgar Allan Poe Crypto Challenge - Historical background, contest details, and solution for the 157 year-old cryptograph which may have been written by Edgar Allan Poe.
http://www.bokler.com/eapoe.html

Between Waters - Daily problems and solutions available with or without interactive browser-based solver.
http://www.betweenwaters.com/

Cryptogram Solver Source Code - Source code archive with several programs to automatically solve puzzles. Also includes "crypo-quote" of the day.
http://www.gtoal.com/wordgames/cryptograms.html

Letter Frequency and Word Frequency in the English Language - Has the statistics for various types of writings(Press, Religious, Scientific), position in the word(first, second, third, last), and digraphs.
http://www.letterfrequency.org

Cryptograms Louise - A new problem every week.
http://www.cryptogramsbylouise.com/cgrams.html

All-Star Puzzles' Cryptograms - Daily problems with browser based solver. The author's name is hidden in the cipher alphabet. [Requires Java]
http://www.allstarpuzzles.com/cryptogram/index.html

Cryptograms Weekly - Weekly puzzles for printing and solving along with the solutions. Also offers a magazine and an online store.
http://cryptograms.ca/

CryptoChallenge - A series of puzzles to solve. Has an encrypted sentence for each level. When it receives the decrypted answer it goes to another page with another encrypted message in a more advanced level.
http://www.geocities.com/krypticl/

RuneQuest Challenge - A multi-layered cipher puzzle using lore themes with cash prizes for various checkpoints and the final solution. In order to be eligible for the prizes, a solver must register their name/address/email and pay a registration fee. Registered people will get some additional helpful clues.
http://members.aol.com/SciRealm/RuneQuest.html

Puzz.com: Cryptograms - Ten problems with solutions taken from famous sayings, adages, and proverbs. By William F. Bultas.
http://www.puzz.com/cryptograms.html

CryptaGram - Offers download of limited version solver software. Extended version available for purchase. Has 14 quote topics, three levels of difficulty, and helpers. [Windows 95/98]
http://www.isn.net/~bpj/

Cryptogrammaton - Ancient Greek mythological themes. Solutions listed separately, along with stories about the mythical characters in the puzzle.
http://www.angelfire.com/yt/lagedor/cryptomenu.html

Cryptagram - Windows version of CryptoQuote and WordSearch. It is available in a freeware and an extended version.
http://www.cryptagram.com

Professor Payne's World of Cryptograms - Interactive browser-based solver. Also contains program to generate cryptograms from a user-submitted quotation.
http://www.freelearning.com/crypto/

Crypto Challenge - Free Windows-based software for solving. Uses quotations, humorous sayings, and scriptures. Extras available for a nominal charge. Includes screen shots. Keeps track of which letters are in play. Counts the frequency of each letter. Word lookup table.
http://www.cryptochallenge.com/