Twitter hashtag: #cdmgamcap
Trello: All teams must use Asana, Trello or something comparable as their project management platform.
Perforce: All teams must use Perforce for version control.
How to use Perforce with Unity effectively (PPT) Thanks Chris Wade for writing this!
PBWorks: All teams are invited to use PBWorks to create and organize documents.
Google Sites: All teams are invited to use Google Sites to create their project website.
Unity3D: All teams are invited to use Unity3D for their game engine. The links on this page provide some great resources: http://gamemodworkshop.com/resources/index.html