Not many can argue against this one. K3b is the most popular burning application for Linux, and although it uses KDE3 libraries, many GNOME users prefer it too over native GTK burners.
The version I'm going to talk about is 1.0.5 for KDE3, but K3b 2.0 for KDE4 is in the works, and the second alpha was made available for testing purposes earlier this year. You can read my review of K3b 2.0 Alpha 1 here.
K3b can burn anything, from audio CDs to DVDs or ISO images. It allows you to save the projects, it includes a powerful file explorer and an easy to use interface. You can also use K3b to create CD/DVD ISO images, it supports projects, multisession mode and ripping video DVDs.
rest here