EasyBCD - EasyBCD is NeoSmart Technologies multiple award-winning answer to tweaking Windows bootloader.
GRUB - Multiboot boot loader
Grub2Win - Safely dual boot Windows and Linux without touching the Windows MBR.
PLoP Boot Manager - The PLoP Boot Manager is a small program to boot different operating systems.
Systemd-Boot - Systemd-Boot, formerly known as Gummiboot, is one of the simplest UEFI boot managers that lets you boot Linux and Windows in EFI mode even if the system is BIOS only supported.
Visual BCD Editor - Visual BCD Editor - advanced GUI version of bcdedit utility. for Windows 7/8/10 and Vista