"Filterset.G" by "Pierceive" a.k.a. "Graham Pierce" a.k.a. "G" is marked with CC0 1.0. To view a copy of this license, visit http://creativecommons.org/publicdomain/zero/1.0. By marking the work with a CC0 public domain dedication, I am giving up my copyright and allowing reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes. [2022-05-19]
For verification, check the Wayback Machine's cache of pierceive.com from before I took the official site down in 2009, go to the FAQ, and send an email to the address listed under "How can I contact you?" with the subject "Filterset.G License Verification" and I will respond with a copy of the license statement above.