GNU Hurd
In 1989, the first version of the GNU General Public License was published. A slightly updated version 2 was published in 1991. In 1989, some GNU developers formed the company Cygnus Solutions. The GNU project's kernel, later called "GNU Hurd", was continually delayed, but most other components were completed by 1991. Some of these, especially the GNU Compiler Collection, had become market leaders in their own right. The GNU Debugger and GNU Emacs were also notable successes.