At the beginning, the first releases of the software for Hairdressers and Beauty salons were developed by Emmanuel Guyot.
On April 2002, the software has been commercialized by the InCrEG company which kept on improving it.
On February 2003, the InCrEG company made an adaptation of the software for beauty salons.
Both software has been improved with new features until october 2004: At this date, the company has been dissolved.
Nowadays, these software are under the GPL license. They will keep on being improved through the Open Source community.
To let you follow the details of the evolution for these two software, the release history is available here for the hairdressing salons and for the beauty salons.