1. Companies starting with J:

      Jaleco
      JAMDAT Mobile
      Jamopolis Interactive
      Jellodyne
      Jellyvision
      Jenniverse
      Jetdogs Studios
      JMG
      John Wizard
      Joju
      JoWooD
      Joybits
      JTC Software
      JV Games

      Note: bolded names indicate companies that released a game within the last twelve months.