Jagged Blade Software - Creators of Xeno Assault and Arch Wing. - http://www.jaggedbladesoft.com/
JT Software - Creators of BingoMaker, Windows software for creating bingo cards. Offers a trial version and purchasing information. - http://www.jtsoftware.com/
Juice Games Ltd - UK-based games developer specializing in the console and mobile market. - http://www.juicegames.com/
Jester Interactive - Includes company information, news, and products. - http://www.jesterinteractive.com/