Coherent UI - HTML5-based User Interface middleware
http://forum.unity3d.com/threads/156665-Coherent-UI-HTML5-based-User-Interface-middleware
使用例
HTML5製のミニゲームをUnityの中に組み込む事も出来ます。
Coherent Blog: Adding a HTML5 minigame in Unity3D with Coherent UI (Tutorial)
http://blog.coherent-labs.com/2013/02/html5-game-unity-3d.html?m=1
ゲーム画面のキャプチャをFacebookに投稿するサンプル。
Coherent Blog: Unity 3D Facebook integration with Coherent UI (tutorial)
http://blog.coherent-labs.com/2013/03/unity-3d-facebook-integration-with.html?m=1
価格
価格はこちら$100〜$2499みたいです。
Coherent Labs | Coherent UI, Game Graphical User Interface, Games, Software, Browser, Downloads
http://coherent-labs.com/UIPricingUnity3D/