Nowadays, if an application lets you apply effects to your webcam images, this is not a great news, but it really gets interesting when it's free for the application and its ManyCam.
ManyCam lets you apply effects to your webcam images. Maybe most of the special people change the background and give you space in the middle of the sea or in some other animation.
It's really fun and you can use it with your normal IM client: Keep a cap, increase your eyebrows or make you big eyes of fun.
Add cartoons and photos, add some text, show date and time, ..
Do not hesitate, many people need you to have fun chat conversations ... and it's free!
If you want to enjoy all features, you will have to register for free.