I was looking for a good animated gif editor for making some new patterns for LEDTrix. I found a web based thing that is pretty cool, it can't do fades good but it can do other patterns. Your mileage may vary.
I've started to crank out some new patterns and the community (And Freestyler) is welcome to whatever I make:
From the edit page it can be downloaded as an animated GIF, hopefully on the public side it can be to? Let me know if there are any issues. I will continue to doodle stuff on the site from time to time to generate more content.
The viewer renders the content much larger than the actual gif, I've been using 12x12 for most of what I'm doing.