Extended-IPL OS boot selector. It can boot 2nd, 3rd or 4th hard disk and from an extended partition.
GAG - Graphical Boot Manager An open source graphical boot manager which supports up to 9 operating systems. Screen shots, version history and download.
MasterBooter Boot manager which can be used to install and maintain operating systems on a PC. Supports many operating systems. Shareware and registered versions available.
MATTsoft Boot Manager: MBTMGR Boots multiple OSs, including several on one FAT partition. Download, installation documents.
Netboot Includes boot manager functionality and boots Linux, DOS and FreeBSD via a TCP/IP network using BOOTP and TFTP.
OSL2000 A universal boot manager allowing selection from a number of operating systems. Includes support for booting from USB, CDROM and other devices.
SOLO: Shag/Os LOader Boot loader for Shag/OS which also supports, Linux and other PC operating systems. Includes source.
zBoot Manager An effective boot manager, which allows the easy install and use of multiple operating systems on a single hard drive. Directly install other OSs to extended partitions and logic drivers.
SyMon Boot manager with support of up to 36 primary partitions,
SysLinux Home of SysLinux (floppy), PXELinux (network), ISOLinux (CD-ROM), ExtLinux (ext2/3) utilities to boot Linux kernel; MemDisk, tool to boot legacy OSs (e.g., DOS) from nontraditional media.