Single executable. 524 KB uncompressed.
From the website inicom.net:
My experience: Doesn't support drag and drop but does have a clear, simple interface. Can optimize a whole folder in a go. No loss of quality that I can tell, but mind you, I've tested this app with my pixelart only, which already has a highly reduced color-palette. Still manages to strip a lot of bytes from any GIF-image. I've compared this app with Trout's GIF Optimizer and the results are pretty much equal. The app is 188 KB smaller though so if you're fanatic about free diskspace... And no ad, if that sort of thing bugs you. Really nice if you want to optimize images for the web.Simple little application which removes the unused colors from GIF image pallets reducing the image size. This also works with animated GIFs and removes duplicate frames.
It's been on my flashdrive for a week and has been used on different machines (XP home/pro only, nothing older) with success, so I'm saying it's portable (only writes MRU keys as far as Registry Monitor can tell, like "last opened folder" and stuff).
You can get it here:
http://www.inicom.net/pages/en.products-freeware.php#3
And hi all. After being a Anonymous Visitor to this website (and forum) for nearly two years, I'm now registered! hehehe.
... me 
