mbldr is a boot loader which fits into first sector of an HDD (MBR). It allows to choose which partition to boot and is intended to replace an MBR coming with DOS/Windows (fdisk /mbr). It may boot OSes above 1024cyl, Linux/BSD are also supported.
CLI mbldr under FreeDOS: main configuration menu
CLI mbldr under Windows 98: configuring timed boot
GUI mbldr under FreeBSD with GTK: choosing device
GUI mbldr under Linux with X11: main configuration
GUI mbldr under Windows Vista: main configuration
Mbldr boot menu itself