Tile Puzzler
- Offering online Pentomino puzzles, Tetris style puzzles, and overlapping tile puzzles. Solve existing puzzles or create a new puzzle.
- http://www.tile-puzzler.com/

AOL Games - Puzzles
- Offers online and downloadable puzzle games.
- http://games.aol.com/puzzle

RiddleScape
- A ranking and competition system based on a select number of puzzles.
- http://www.riddlescape.com/

Quadrix
- Click on squares to change the color of neighboring squares and bring the entire grid to one color in this JavaScript logic puzzle.
- http://jumk.de/quadrix/quadrix_e.shtml

Philosophy Games
- A series of philosophical puzzles to challenge the mind.
- http://www.philosophersnet.com/games/

CombinationLock.com
- Select a numerical sequence based on clues. Has a hall of fame.
- http://www.combinationlock.com/

NIM
- Two player game in which players remove matchsticks in an attempt to force the other player to remove the last one. Played online against the computer or downloadable.
- http://www.neil-mackenzie.com/nim/

Contamination
- Take over the entire board by contaminating enemy pieces in this online Java game that combines strategy and puzzle elements. Play against the computer or up to two other players.
- http://student.dei.uc.pt/~pamaro/puzzle.html

JC Lava
- Online game of logic in which players place pieces in rows and attempt to surround four of the opponent's pieces to win. Play is available for two players or one player against the computer.
- http://jarci.w.interia.pl/

SegPlay
- Play to beat the clock in this online version of a paint-by-number puzzle in Java. Features a selection of categories and images.
- http://www.segmation.com/SegPlayChoose.asp

Celtic Solitaire
- Online puzzle game in which the player must form lines of five or more color marbles to score points and enter the top 20 players list.
- http://www.i-taneva.com/workshop/solitaire.html

Tilt Puzzles
- Labyrinth maze game, tilt the board to place the squares on their targets.
- http://www.clickmazes.com/newtilt/ixtilt.htm

Caught At Work Productions
- Offers a new brain teaser each Thursday, plus archive of past puzzles.
- http://www.caughtatwork.net/

PING
- Maneuver balls into green chutes to score points in this online puzzle game that is a test of physics and strategy skills. Complete levels by rebounding a ball into eight chutes before time runs out.
- http://www.smerc.com/ping/

Dots and Boxes
- Java applet playing at one of three levels of difficulty, with variable board size.
- http://www.well.com/user/argv/java/dots.html

Blueee's Number Puzzle
- Online game that displays a random choice of one of 15,000 different math puzzles. Six nested equations are shown with icons instead of digits. Find the digits to solve the puzzle.
- http://www.tote-taste.de/X-Project/index.html

The Problem Site
- Solve math problems, brainteasers, word games and riddles. Featuring a selection of free puzzles to help develop problem solving and lateral thinking skills.
- http://www.theproblemsite.com/

Lightsout Cube
- An online version of Tiger Toy's Lightsout Cube and links to other Lightsout puzzle sites.
- http://www.gersolutions.com/lightsout

The Stone
- Information about the internet's mystery game, The Stone.
- http://www.netfysh.com/thestone/

Misronet.com Puzzles
- Offers free interactive logic puzzles including solutions and tips on how to solve brain teasers.
- http://www.misronet.com/puzzles01.htm

SameGame
- Goal is to remove all color tiles from the field, by removing connected groups of the same color tiles.
- http://www.yook.de/samegame/

Masterword
- Try to guess the 4 letter word the computer is thinking of in no more than 10 tries.
- http://www.masterword.co.uk

The Lateral Puzzles Forum
- Set or solve lateral thinking puzzles. Includes a selection of current and already solved puzzles.
- http://www.lateralpuzzles.com/

Hexcite
- An online version of a board game where you try to place all your pieces a hexagonal board. Play against the computer.
- http://www.hexcite.com

Cross Rings
- Arrange the chain links in alphabetical order to solve this Java puzzle.
- http://brightworld.com/CrossRingsPuzzle/

Cryptarithms
- Features online brain teaser puzzles in which the digits of a sum are replaced with letters or other symbols. Find the correct numerical digits for each letter to solve the puzzle.
- http://www.cut-the-knot.com/cryptarithms/st_crypto.html

Set Game
- Online versions of Set and Quiddler mathematical and word card games. Features a daily puzzle and contest.
- http://www.setgame.com/

Dot 2 Dot 4 Fun
- Online version of the classic Connect the Dots game. Offers a choice of pictures in categories that include people, buildings, and animals. Requires Shockwave plug-in.
- http://www.dot2dot4fun.co.uk/

Brainwave
- Determine the shape that doesn't fit in this series of ten visual logic puzzles. Solve all ten and get a top 5% brain award.
- http://www.wognum.se/brainwave/

Sokoban
- Tidy up all the crates of mail.
- http://www.pimpernel.com/sokoban/

Rolling Cubes
- Roll eight half black and half white cubes around a 3 by 3 grid until you have reversed the colors.
- http://www.righto.com/java/rollingcubes.html

Facie!
- A game about feelings and intuition, the object is to make Facie smile with the least moves possible. Playable on the Web or mobile phone, and includes the ability to create a game for others to play.
- http://www.facie.com/

Rockz
- Escape the caves with as many diamonds as possible, while avoiding falling rocks and flying creatures in this free Java game.
- http://rockz.co.uk/

Chockablock
- Java game in which the player tries to score points by filling up 3 by 3 squares on a grid using tetris style pieces. Try to make the high scores list.
- http://www.loquax.com/chockablock/