Add special effects to video chatsCamTwist for Mac is a free video app that allows you to spice up your chats with all sorts of original and special effects. CamTwist is a little difficult to set up, but once installed it works with most video chat services, such as Skype, Yahoo! Messenger and uStream. You can also stream from the desktop, or Flickr, for example. CamTwist includes a Studio section
