This freeware program is designed to help you reduce the size of your GIF files. There are certain optimizations that can be performed with absolutely no loss of quality, as well as some that can provide additional improvements with some loss of resolution. Best of all, Trout’s GIF Optimizer is completely free.

An anonymous reader complained They call it freeware then make you pay. To be honest, I can’t see any indication of this on the web site, other than the usual request for donations. Somebody correct me if I’m wrong!

http://chemware.co.nz/tgo.htm