RGCD	Carries a handful of Hombrew Tiles, CD and Cartridge, from developers Orion and Reboot.
Songbird Productions	An older website that helped bring titles that were almost not released to the general public. They also have a large catagory of Jaguar product.
The Goat Store	A general Atari retailer. They carry a assortment of Atari Jaguar product.
Eight Bit Fix	8-bit retailer, games and some hardware for the Jaguar.
Video Game Source	A German retialer, also with an assortment of official Atari Jaguar Product.
Good Deal Games	An American seller that carries a good deal of homebrew titles.
Best Electronics	From the Site "The World Leader in Atari Parts and Atari Supplies." An American general Atari retailer who regularly updates the site.
Console 5	Another American retailer. Carries both recent hombrew as well as offically released Jaguar games.
Ebay	Just a general search of Atari Jaguar stuff on Ebay.
Telegames UK	The publishers of classics like Iron Soldier 2 and Soccor Kid. (Link goes to Jaguar catagory of the store).
Video 61	They are a 27 year old Atari mail order house & service department. They hold a large selection of Atari product, including Jaguar.