General Gaming and Simulation
About.com's Boardgame Site is a good place to start.
Mark Bakke's Night Owl Mk. II hosts Boulder Games and has an ecletic collection of material, including a wargamers' home page list.
BattleGroup Boston is the best miniatures club in Massachusetts and sponsors Havoc, an annual convention.
The name could be better, but BoardGameGeek is an indispensible site for gamers.
Boardgame News includes a section for teachers.
The British Wargames site features the Wargames and Military Search Engine.
There are many decent chess sites on the web. Chess-poster is pretty good.
ConsimWorld focuses on breaking wargame news and discussion.
The Escapist is a role-playing game advocacy group.
GAMA publishes Games in Education, a pamphlet series on classroom gaming, and has other programs for teachers, including a Google Group.
The Game Publishers Association is an association of small game companies. It also sponsors The GPA Ring.
Game Theory.net studies that topic.
Gamestalk is a game chat site.
Rick Heli's site has extensive game bibliographies, design links, and ludographies.
History of Games: Book Search is a decent bibliography of writings on the subject.
The Maxwell Air University's Library has an extensive listing of professional wargames.
The Military Web Ring unites military historians, wargamers, and hobbyists.
The Motley Fool offers many articles on games.
The Online Guide to Traditional Games offers a lot of information on many old favorites.
Pastimes and Paradigms is an online game history exhibit.
Brian Phillips's home page has a massive collection of gaming links.
Vitas Povilaitis also has extensive game links and materials.
RPGnet hosts back issues of Games & Education, including my article on classroom gaming. It is also the definitive role-playing game site.
Strategy Gaming Society home page.
TotalCon is a major eastern Massachusetts game convention. All genres.
The U.S. Army War College offers a wargame bibliography.
Tom Vasel reviews lots of games, and has an interview series with designers and publishers.
The Wargamer's Ring is the largest conflict simulation webring.
Web-Grognards is the major source of wargame information on the Web. It includes The Battle for Moscow, First Blood: Guadacanal, and links to many other freeware games.
Yahoo has over 92,000 Groups devoted to games. Especially useful are the BoardGameDesign, boardwargaming, rpg-create, Spielfrieks, and wargame-creators Groups.
Game Design and Marketing
The Boardgame Designers Forum is pretty much what the name implies.
John Champaign has a thorough listing of game design sites.
Greg Costikyan's web site has some interesting articles on game design.
James F. Dunnigan's The Complete Wargames Handbook contains extensive information on wargame history, game design, and his career. Also worth visiting is his homepage.
EDTEC 670. Materials for a game design course at San Diego State University.
Alan Emrich's site includes materials for his Principles of Game Design course taught at The University of California-Irvine. The site includes freeware versions of Napoleon at Waterloo and Strike Force One.
Games Concepts studies game mechanics.
The IGDA is a professional association for game developers.
Tom Jolly's site includes information on game marketing.
George Phillies and Tom Vasel have written two books on game design. Available here.
Reacting to the Past is a consortium of colleges developing educational games.
rec.games.design's FAQ is a good place for a beginner to start.
The Scratchware Manifesto. The dark side of game design.
Sloperama Productions has information on the business side of gaming.
Game Media
Board Game Studies is an academic journal on game history and design.
Mark Boone's site has wargame magazine indices.
Countermoves is an online wargame zine.
The Diplomatic Pouch is the best online Diplomacy zine.
Game! is published by Game Table Online. The site also offers online game play and resources.
The Game Cabinet focuses on European games.
The Game Report Online supports the print version of the magazine and offers additional coverage of the gaming world.
Game Studies is a web journal devoted to computer game research.
The Games for Educators site has newsletters for educators.
The Games Journal is a monthly boardgaming e-zine.
iSimulacrum offers support for the game collecting journal of that name, a wargame database, and counter scans.
MagWeb is a commercial site offering over 60 military history and wargaming magazines for a reasonable fee. The site offers sample articles from each of these publications.
The Miniatures Page is the best online zine on the subject.
NASAGA publishes Simulation & Gaming, the most important academic journal on the subject.
Lewis Pulsipher offers Sweep of History Games Magazine as well as articles on game design and his own work. Teach Game Design is his blog on the subject.
Terra Nova is a weblog focusing on MMORPGs.
James Werbaneth’s OnLine of Departure offers support, including computer freeware, for the print magazine.
Online and Freeware Games
The Black Plague Simulation is aimed at the middle school level.
The Board Gamesbook is a good source of information on free games.
The British Go Association offers downloadable versions and online play.
Chris' Compendium of Free RPGs is a good list of free role-playing games available on the internet.
Louis Coatney's home page includes the free 1st Alamein, The Russian Portfolio, Leyte Gulf, Moscow Attacked!, Moscow Defended, and Stalingrad Attacked!, along with game design articles and naval modeling information.
Crisis at Fort Sumter is an interesting simulation of the Civil War's start.
Educational Freeware lists and reviews free online materials for teachers.
Run by the Department of Education, the Educational Resources Information Center has educational games and materials, usually for free.
Free At Last simulates the civil rights movement.
Freewargamerules collects free miniatures rules.
Game-It-Yourself lists free games on the web.
History Lessons for Junior Generals has numerous simulations for the lower grades.
David Kershaw has several free historical games on his site.
John Kim has links to over 500 free RPGs on the web. There is a lot of information on RPGs here, including a games and education page.
Lloyd Krassner's Warp Spawn Games site has over 420 of his games and variants.
Learning Vocabulary Can be Fun is aimed at lower grades.
Mancala is the oldest game in the world. Play it here.
Microtactix's PlainLabel Game System can be used for a variety of RPG and miniatures projects.
Information on Philip Sabin's course on Conflict Simulation at King's College, London, can be found here
Garry Stevens' site has several historical games, mainly involving the British monarchy.
Sudoku is this the latest puzzle craze. Try this site for starters.
Tabletop Sports offers sport game downloads, including Extra Innings.
TableTopSportsGames has free games in several sports.
Computer
Many of CompuServe's legendary forums are now open to the public.
Excite has a good online game section.
The Electronic Frontier Foundation is protecting your rights on the Internet.
FTP Explorer--an FTP program free for educational users.
The Free Site--a good source of computer freeware.
Freeware Home has a wide selection of educational games.
FreeZip--a nifty zip/unzip program.
Galaxy Internet Services hosts this site.
Google Groups is the place to find and search Usenet groups devoted to games. Now owned by Google, probably the best search engine.
The Internet Archive is a library of internet history.
Kapasearch is a computer site directory, including game sites.
Lycos is a network of interesting sites, including Wired.
NebulaSearch includes an internet encyclopedia and directory.
Open Here is a family-oriented portal.
Tired of Netscape and MSIE? Try Opera, now free.
SiteAid-- the HTML editor used to create this site.
Starting Point is a search-oriented site.
Tera News provides usenet access for a nominal fee.
Reading
Citizendium is another open source encyclopedia, but more regulated than Wikipedia.
eFanzines hosts online science ficition magazines.
The Etext Archives stores electronic texts and zines.
The Journal of Electronic Publishing covers numerous topics of interest to Internet publishers.
LivingInternet offers a concise introduction to Internet history.
Space.com covers space exploration news thoroughly.
Spicy Green Iguana is the best source of information on science fiction magazines.
Wikipedia is an online encyclopedia being constructed by the open source process.