You could have downloaded ShowMacster 1.9 for Mac from our software library for free. The application is categorized as Communication Tools.
From the developer:
ShowMacster is an extension to Apple's iChat which enables you to stream pictures, QuickTime movies and live screen captures during a video conference.
By adding a drawer to the video chat window, it is seamlessly integrated into iChat. You can even import a collection of your favorite pictures, icons or movies to show them instantly.
You may want to check out more Mac applications, such as Skype2Prowl, which might be related to ShowMacster.