Toast Deluxe is well worth the money. Its the best, and one of the only packages out there.
There is the Apple DiscBurn software, but it may not support your burner. Being SCSI and all...
There is Jam for Audio, but it ONLY does Audio. You'd be better off with Toast which can do all formats.
There is the Radialogic software, but thats not in production anymore - Apple bought it out.
There is another one, I think its called WaveBurn? I've never used it.
Oh, and NeroMax, the Mac version of Nero, is either coming out or out already...
Cipher13