CDBurnerXP Pro - Free Nero Alternative
Features highlight:

* Write CD-R, CD-RW DVD+R/RW DVD-R/RW discs (as Data and Video)
* Burn audio-CDs with and without gaps between tracks
* Supports most IDE, USB, Firewire and SCSI drives
* Rip Audio-CDs to harddrive, obtain track-information (ID3-tags) from Internet
* Burn and create ISO-files
* Data verification after burn, create bootable discs
* 100% freeware - no adware or restrictions
* Audio Editor (ver. 2.2.9 and upcoming version 3.5), bin->ISO converter, simple cover printing and much more!

http://www.liewcf.com/blog/archives/2005/01/cdburnerxp-pro-free-nero-alternative/