David Lawrence Memory Game Match photos of male faces in the least amount of tries possible. Offers three difficulty levels. Requires JavaScript. http://www.concentric.net/~Noshadow/memory/

Java Seeking Match pairs of cards in this online memory game. http://home.netvigator.com/~kinghong/puzzle.html

Memory Game Try to remember a sequence of letters or numbers in this online test of memory skills. Offers regular or timed game versions. http://ourworld.compuserve.com/homepages/easysurf/menu.htm

Re-member Online memory game featuring multiple levels with increasing difficulty, plus a high score list. http://www.re-member.de/

Simon Advanced Flash version of classic game featuring five skill levels, high score list, guestbook, news, and downloadable version. http://www.powzone.com/games/simonadv/

KISS Concentration Game Memory game based on photos of the band Kiss. http://www.kissdominion.com/SHOKWAVE.HTM

Fwend.com Tangram Interactive Java applet with more than 150 puzzles. Puzzles are offered at three difficulty levels and include solutions. http://www.fwend.com/tangram.htm