FamFamFamMiniIcons
"Mini" is a set of 144 GIF icons available for free use for any purpose.
The flag icon filenames follow the ISO 3166-1 alpha-2 country codes.
Source
These Icons come from These Icons come from
http://www.famfamfam.com/lab/icons/flags/
readme
Icons
See also:
FamFamFamContrib
,
FamFamFamFlagIcons
,
FamFamFamMintIcons
,
FamFamFamSilkIcons