"What is humans.txt?
It's an initiative for knowing the people behind a website.
It's a TXT file that contains information about the different people who have contributed to building the website."
I think I'm going to start doing it on all my projects from now on, another little indiscreet signature when you don't want it plastered somewhere on the site. People really take for granted how much work goes into developing a nice web site, which is also why I'm no longer doing freebies.