"Mini" is a set of 144 GIF icons available for free use for any purpose.
Source
These Icons come from http://www.famfamfam.com/lab/icons/mini/
readme
Icons
See also: FamFamFamContrib, DocumentGraphics, FamFamFamFlagIcons, FamFamFamMintIcons, FamFamFamSilkIcons, FamFamFamSilkGeoSilkIcons