UCB (Ultimate CD Burner) is command line CD writing program. It uses libburn library (http://icculus.org/burn/). UCB has simple and very useful command line interface. Currently it can be compiled only for Linux, since libburn works only on Linux, but in future other OSes will be supported (such as *BSD), as soon as libburn will support them.
UCB destributed under the terms of the GNU General Public License.
Latest release is ucb-0.1.1. You can download it from sourceforge project page.