| 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. |
| CrosswordLinks.com | | A comprehensive resource with rules and helpful tips, articles, software, forums, and information about leagues, tournaments and online play. |
| Crosswordsite | | Both American and British English styles graded from easy to hard for solving online or on paper. | |
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