You're thinking free as in beer. Free as in speech means open source. As a developer you gain more from that as you can tweak/maintain your own software if needs be.
Wow. I'm getting quite of a down votes. I'm not opposed to Open Source software, actually I'm contributing to one of them. What I meant is that when the price tag is so small comparing to your earnings (since you are going to use the software for work), why would you make it a decision factor when picking an OS?
