- Able2Know - A public forum for riddlers and riddle lovers in several topics.
- Amusements in Mathematics - Riddles by Henry Ernest Dudeney.
- Brain Teasers - Classic puzzles and riddles sorted in several sections - general logic, weighing puzzles, Einstein's riddles, number sequences, and crossing river.
- A Collection of Quant Riddles - Logical and lateral type thinking riddles with some answers.
- Daily Outrageous Rebus Riddle Contest - Cartoon rebus riddles posted daily. Answers are submitted by e-mail.
- DiMensIoNS - Riddles abound, odd and complex riddles, brain teasers. Explained meanings and complete answers.
- Fleabusters' Kids Fun Page - Riddles with responses as well as unanswered.
- Harder Riddles - Some harder riddles marked with stars to identify the degree of difficulty of each riddle. Accompanied with answers.
- HumorShack - Archive of cartoons, riddles with answers and a free mailinglist.
- Jason's Puzzler Page - Small collection of riddles with answers.
- The Masters of Logic - The difficulty of the logic puzzles increases until almost unsolvable. The list "The Masters of Logic" shows the solutions.
- Opossum Sally's Goldenmean - Collections of jokes and riddles from penpals.
- Pack 114 Fun Pages - A collection of ten trivial riddles.
- PickandSend - A collection of brain teasers, riddles, and logic puzzles. Answers on highlight, sending feature.
- Puzzles by Sam Loyd - Ten puzzles from a collection that appeared in various newspapers and magazines over the previous fifty years.
- Random Riddles - A collection of submitted riddles.
- Riddle of the Week - Just one question a week. Answer on e-mail.
- Riddle Planet - A contest with twenty-five riddles per each classified round with a money prize for the first person to solve them all.
- RiddleAday - Riddles, puzzles and brain teasers to challenge and entertain all ages. [E-mail lists]
- Riddle-Poems, and How to Make Them - The gentle and literate art of the rhyming riddle.
- Riddles - Some challenging riddles to solve. Answers below each of them.
- Riddles - A collection of riddles sorted into categories to amuse, puzzle and test.
- Riddles at Funtestiq - Interesting riddles served to you automatically.
- Spreadsheet Jokes - A bunch of riddles on spreadsheet programs.
- Stumpers - Math and word riddles, which were created by students in Mrs. Henson's classroom. Includes answers.
- Sureshot Riddles - A fun and challenging collection of logic riddles and sequences.
- Tree Riddle - An old multiple riddle. Identify 65 names of trees.
- Tyfani's Weekly Riddle - Offers mad gab-type riddles with solutions and archives.