Is it possible for a freelance programmer to use Open Source products under GNU Public License and make money given that he cannot stop his customers from freely distributing his products?
Freelancing and GPL?
freelancing;gpl
IANAL (I am not a lawyer):  Freelancing and GPL are very compatible -- if the client is a company that wants something done, rather than a product they can sell, the fact that it is GPL is actually a bonus.  It clearly establishes the copyright situation.It can also be used effectively when what you are selling is a service.  Only when you are developing something that is going resold to others would the GPL be a possible obstacle.