Cubic - Cubic (Custom Ubuntu ISO Creator) is a GUI wizard to create a customized bootable Ubuntu Live CD...
YaST - YaST is the installation and configuration tool for https://alternativeto.
Distroshare Ubuntu Imager - Remaster your Ubuntu install!
Linux Live Kit - Linux Live Kit the ultimate way to bring your linux to life. Create your own live distribution
mklivecd - LiveCD provides that platform for creating your own LiveCD based on Mandrake Linux.
Ubuntu Customization Kit - Helps to customize Ubuntu and derivatives ISOs to your needs.