Memory

David August Memory Game
Match photos of male faces in the least amount of tries possible. Offers three difficulty levels. Requires JavaScript.
http://www.davidaugust.com/memory/

KISS Concentration Game
Memory game based on photos of the band Kiss. [Requires Shockwave]
http://www.kissdominion.com/shokwave.htm

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

Qubory
Variant of the classical memory game using a rotating cube. [Requires Flash]
http://www.qubory.com

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/