My driver doesn't have the unregistered banner and is free for any use.

After installing a driver run the configuration utility, enter $URL$/video into URL field, fill username/password as you configured them in application, and press Autodetect to check if it works and automatically detect the resolution.

Now, start your favorite videochat application and enjoy your new webcamera!

webcamXP MJPG filter is free for personal use. This driver has a good compatibility and supports multiple cameras. The only app known to me that doesn't work with it is Google Video Chat.

Get it here or visit its home page here.

For setting it up, open configuration window in your videochat application, like Skype:

Configure it to use $URL$/video as a video source, and enter username/password if you need them.

Press ok and you're good to go!

Linux driver allows you to use both audio and video on Ubuntu Linux and compatible operating systems. It's both free and open source.

Get it here.