Is it OK to share freelance opportunities on this site? I'm a freelancer myself, and from time to time have need for specific skill sets for my clients.
NO. We do not allow advertising in the form of quesions on this site. However, Stack Overflow (the new name for the company who owns the SE Network of Sites) does allow advertising in the form of banner ads, or job ads on their Careers site. Please see this link for more information.