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/

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/

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/

ADDiction Solve each Java-based puzzle by swapping pairs of adjacent numbered tiles whose sum is a multiple of 3 or 5. Available for play online, or download. http://www.geocities.com/TimesSquare/Labyrinth/2288/add/index.html

Colors Try to line up five matching colored chips for removal, while the computer adds extra chips to the board randomly after every move. Use strategic skills to play for high score in this online Java puzzle. http://www.geocities.com/SiliconValley/Park/5199/colors.html

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

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

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/

Lucas' Problem Solve the ancient puzzle where you have 4 black and 4 white counters in a line and a space in between them and you need to swap their positions. http://www.bestpages.com/homepage/puzzle/

Philosophy Games A series of philosophical puzzles to challenge the mind. http://www.philosophers.co.uk/games/games.htm

JamesBondNews.com Police interrogation logic puzzle. Must submit email address to receive the solution. http://www.jamesbondnews.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/

Fragmind Try to place a set of colored fragments on a grid so that each column of the grid contains only one color in this online Shockwave puzzle game. May choose number of columns and colors to be played. http://www.fragmind.com/

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

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

Queue Click buttons to push shapes onto a checkerboard grid in this Flash-based puzzle game. Objective is to cover tiles with a piece of the matching shape. Offers 50 levels of increasing difficulty, and a high score list. http://www.gamekitchen.com/games/queue/

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

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

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

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