Imager-marquee is a project mainly written in Perl, it's free.
Generating a circular/shaked animated GIF
Imager::Marquee -
use Imager::Marquee;
Imager::Marquee is
Kentaro Kuribayashi [email protected]
Copyright (C) Kentaro Kuribayashi
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.