Ulrik Haugen <firstname.lastname@example.org>. James R. Van Zandt <email@example.com> contributed lots by creating autoproject without which I wouldn't be using automake and autoconf. getopt* and error* come from the GNU C Library. Magenta H. Nezumi <firstname.lastname@example.org> has helped find bugs and given valuable feedback. Peter Pentchev <email@example.com> and Kris Kennaway
have helped find bugs. Graham Mitchell <firstname.lastname@example.org> contributed a performance patch.