Are there any free sites to help you quit porn

I was on the site desexualizedmind.com after watching this video: How Porn Hijacked a Generation and I was so happy, because I thought I had finally found a way to quit my porn addiction. I went to the site and watched the video on the homepage, but when I tried to start the 30-day thing it said I had to pay 97 dollars (I am broke and I have no money) Are there any alternative sites to this?