1. The safest sex, by far, is no sex.
2. Good luck finding free condoms. SOMEONE will have to pay for them somewhere along the line: there is no condom mine in Colorado or anything like that. Nothing in life is free. If you're willing to pay out-of-pocket and give them away for free, then more power to you.
3. If you try the local clinic or hospital, they're not going to be too happy if you take a lot of them. Maybe then they won't be free anymore!