Free Getopt is a clone of the GNU getopt library, but BSD-licensed rather than GPL-licensed. It also adds DOS-style getopt option handling.
The latest version is 0.11. It only handles short getopt options at this time. getopt_long and getopt_long_only are next priorities. DOS-style option handling will be the last thing on the list to be supported.
Actually, I'd like to correct myself. Improving this webpage will be the last thing on the list. ^_^;