Ouch retail boxes are always a good idea for CDRWs...
I don't think there is any free CD Burner software.
There are of course *other* methods for obtaining CD burning software, but that's your choice. Personnaly I bought mine in a Retail box for EZCD Creator 4.02, and I have a license to CDRWin. CDRWin is only $50. I find it very good for CD to CD copies, but not much good for anything else. I suppose it does audio CDs better than EZCD Creator to..but I find EZCD easier to use, and it seems to work fine for Audio CDs.