List of UI systems for games

Here's a list of third party UI systems for use in games.

Commercial Systems

• Anark
• Scaleform Gfx
  
• Menus Master
  
• XUI (360 only - installed as part of Xbox 360 SDK)
  

Open Source

• CEGUI (Crazy Eddie's GUI) (Free and can likely be easily ported to console)
  

Am I missing any? Post the name and I'll add it to the list (and not publish the post, to keep the page cleaner).