Review: HTC EVO 3D
The EVO 3D offers the stock Gmail, Google Talk, SMS, and email apps. There's no other instant messaging software on board. The stock apps all work well, as they do on other Android devices.
The EVO 3D also substitutes HTC's FriendStream for Facebook, Twitter, and other apps. Friendstream delivers a stream of status updates and posts from friends, and can sort between status posts, shared links, shared photos, and direct messages. If you want the full feature list for Facebook and Twitter, you'll have to download the native apps from the Android Market.
Despite the presence of a user-facing camera, there is no video chatting software on board that I could find. You'll have to download Skype, Qik, ooVoo, or Fring on your own.
Google's Latitude app is on board; Foursquare isn't.