If I use an open source content management system in website for a private business, do I have to pay someone? I am starting an a social networking-type sight targeting Chinese users. Are business model is based on businesses marketing to users of our social network. I am currently searching for freelancers to build the site for me. If they use an open source content management system or other open source frameworks in the site, will I run into legal problems or have to pay licensing fees to someone?