You can use the applet freely to enhance your web pages (commerical or non-commerical). However, I placed a status bar warning that will appear when the applet is online on a site and regcode parameter isn't correct.

 Author:   Gokhan Dagli
 Mail :   quickshare@excite.com
 Class File :   screw.class
 Registration Fee: 19USD (You can download and test it.)