licensing

Do I Have to Use a Free/Open Source License?

Open source? Proprietary? What license should I use to release my software? A few weeks ago I ran into a neighbor, whom I'll call Leo, while he was out taking his dogs to the park. Leo stopped me to ask about some software he's developing. "Hey, you do open source stuff for companies, right?" Leo asked. "Yeah, that's my freelance business. Do you need some help with something?"