コラボレーションによる3Dソフト開発環境croquet
Squeakのアラン・ケイによる3Dのコラボレーションによるソフト開発環境であるcroquet。
...a new open source software platform for creating deeply collaborative multi-user online applications. It features a network architecture that supports communication, collaboration, resource sharing, and synchronous computation among multiple users. Using Croquet, software developers can create powerful and highly collaborative multi-user 2D and 3D applications and simulations.