Jem Sites

Almost the Last Stand: A neat new site with tons of original Jem art and fanfic. 
Antipathy's Jem: Jem stuff for sale.  Yay!  A funny and informative Jem site.
Bella & Stravagante: First Italian Jem site, featuring exclusive BGM mp3s!
Bethany's Jem Collection; Not your average collection page, she's got some really rare (as in, prototype) stuff too!
Beyond Jem: Jem collection photos & (some pretty good!) sale stuff too.
Beyond Outrageous: Anime Jem, some great Jem fan art.
Britrock- The UK Home of the Misfits  Deals specifically in US vs Euro doll differences, lots of fanfic and extremely in-depth character profiles! 
Diva Jezebel's Jem Store: Stuff for sale (yay!) Superstars Collection and more.
El Culto De Jem: Chilean (also in English) Jem site with live-action doll animated videos of the show.
Etienne Toys: Has some MIB Dutch Jem items for sale for reasonable prices.
Fezpez Auctions  Usually has single Jem items for sale.  Great for completers. I have bought from her and highly recommend! 
Floortje's Jem Shop  No longer selling through her site (I'm very sad about this!) but the site still exists.
Forever Jem: Collection photos and customs.
Hasbro The offical site.  Do a keyword search for Jem and see what you find! :) 
Glamour and Glitter: Jem original fashion designs! 
Hot Topic usually has something Jem (currently made) for sale.
Jem & Friends: Defunct Message board about Jem, not sure how long these archives will remain public :(
Jem & Friends Forum: New Jem messageboard that has taken over the old Jem & Friends board.
Jem & The Holograms World; Collection site, stuff for sale, customs & more.
Jemboard: A Jem message board.
Jem Brazil Website: :( About 90% stolen graphics (plenty of mine are there!) but *does* have Portuguese Jem songs to download... so maybe I'll forgive them... 
Jemcon 2007: Will be in Chicago this summer.
Jem Evolution: New Zealand Jem site, lots of downloads.
Jem Fan Page: Jem meets the Sims, and more
Jem Glam:  German Jem site. 
Jem Girl: Jem song remixes, sale stuff, customizing information.  Very creative Jem site.
Jem Gorgeous: Polls and other fun stuff. 
Jem Grrrlz! A good ol' Jem site with lots of info, unfortunately I don't think it's being updated anymore.
Jem Jello: A new site (not entirely functional at the time I'm writing this) but has promise...
Jem Prototype Fashion Site: A listing of all the recent Jem protos that have been on Ebay lately.
Jem Sims!: Jem Sims 2 skins to download.  Lots of cool fashions!
Jem Things & Stuff; Multimedia site with lots of Jem art.
Jem Unites Us: Jem fan art site.
Jem Unlimited  Lots and lots, and lots of Jem stuff.
Kett's Cel Gallery Easily has the largest Jem cel collection I've seen.  Me wantee!!!
Kimmy's Jemstar Fashions: Handmade Jem fashions.
LadyToysJem: Not much I can tell you about this site (it's Italian) but it's got some nice photos.
LJC's Jem Sites: Not just one, or two, but FIVE Jem sites in one.
Luca's Gallery of Jem Artwork: Fabulous Jem paintings!
Makin Mischief Has an exclusive interview with the Jem doll box artist!
Midsummer Night's Madness: Featuring Jem Avacons & Fanfic. 
MoggyGoddess Photos: Photos of early Jem prototype toys from Christy Marx.  A must for any fan of the doll's development.
Outrageous Fashions: Beautiful custom Jem fashions for sale.
Perfect Blue: Fansite dedicated to Stormer.
Shana's Fashions: Handmade repros, customs designs and sales list.
SOS for JEM: Help join the campaign to get Jem back on the air. 
Spice Girls Vs Jem  A page comparing the similarities between Jem and the Spice Girls. 
Spleen!: "Spleen is Excitement! ooh Spleen!...."
Sunflower Girl's Truly Outrageous Jem Realm: Song lyrics, Fan-fic & more.
Tommy's Fashion Dolls  Pictures of his gorgeous custom Jem dolls & more! 
Totally Jem!  Awesome Jem page, some Prototype information and more.
Truly Outrageous Jem Primer: Brush up on the basics of Jem.
Truly Outrageous Mailing List Archives:  The TO! List was my introduction to the world of Jem online, here are the archives (including "Ask Christy" (Marx), episode guides, talent bios & more. 
Universal Appeal Jem  Another super site, lots of info on Jem in other countries.  This site is really comprehensive, one of my faves. You will need a couple hours to do this one! 
Yahoo Groups TrulyOutrageousJem: This is great place to get in touch with other Jem fans, read posts, trade, etc.

Related to Jem sites

Attack of the Anime Toys!  Website owned by the former Grand Poo-bah of Jemdom.  Awesome site with beautiful pics of anime dolls! 
Crissy and Beth: Awesome site about 70's Ideal doll Crissy.
Custom designs by Matthew Sutton: Drop dead gorgeous custom Barbie dolls; soon to feature Jem customs!
Darci's Very Own Website: Website about Darci, a doll who has some similarities to Jem.
Elizabeth Reid Steere's Sindy Doll Page:  Sindy's body was surprisingly similar to Jem's.
Maxie 101: Currently the Maxie website I know about, I cannot figure out where the title page of this site is :(
rebeccachulew.com  A Barbie site run by a fellow Jem fan :) 
Lace: Celebrity Rock Star with Fashion & Fame  A page devoted to a Jem knock off called Lace, by Creata.  If you have fashions you think may be Jem, but aren't here, they may be on this site.
Topper Dawn Doll Archive: Dawn dolls are 6" fashion dolls that rivalled Barbie's popularity in the 70's. Plus she had way cooler clothes. This is the best Dawn site I've found on the 'net!

See also Jem VIPs for links to sites about the people behind Jem.