I love this page in the proxomitron site:

Shonenware

Shonenware is a concept dedicated to the support of the one-and-only, world famous, female power-trio from Osaka Japan Shonen Knife - kawaii creators of the very best music in the world!

Under the terms of Shonenware, Proxomitron is free for personal use. You can use the program as often as you like for as long as you like. You are under no restriction to stop using it after so many days, or indeed ever! You can also, of course, freely copy it as long as you abide by certain conditions (see below). However, If you find the program useful you're encouraged to "register" it.

How to register....

To register simply go out and buy any CD, record, or tape by Shonen Knife, listen to it carefully, and e-mail me your impressions of the album. Be sure to include detailed-enough descriptions of the songs to convince me that you actually *did* buy the album ;-). Alternately, mail (not email - no binary attachments please) me a picture of you holding the CD. If you can convince me you really do own a Shonen Knife album, well, then you're registered...

...Why register...

Although not required, Registration accomplishes they following nifty things.

It makes me happy (because I like Shonen Knife)!
It makes Shonen Knife happy and allows them to make more albums which...
It makes the entire world a happier place!
And most importantly, it can make you happy since it results in owning a magical Shonen Knife album of your very own!
Now, how often does registering a program give you the chance to improve the entire world? ;-)