The IOCCC (International Obfuscated C Code Contest) is an organization dedicated to those who try to write the most unreadable, awkward C code on earth.
main(v,c)char**c;{for(v[c++]="Hello, world!\n)";(!!c)[*c]&&(v--||--c&&execlp(*c,*c,c[!!c]+!!c,!c));**c=!c)write(!!*c,*c,!!**c);}