WebcamMax
If you want to equip your live stream with your logos, sponsors or other stuff or if you just want to mess with people over a video conversation through MSN, Yahoo or Skype then you can use WebcamMax. WebcamMax is not free, but you can get a free license by write a blog post to promote their software on your website and send them the link to your blog post. In the trail version you have the watermark in the top of the video when you’re using WebcamMax, but if you buy or get the free license (by writing the blog post) you can remove the watermark and replace it with your own logo or photo. WebcamMax is not for Mac, but Mac has something called Cam Twist and it is as good as WebcamMax.