EasyBCD - EasyBCD is NeoSmart Technologies multiple award-winning answer to tweaking Windows bootloader.
Grub2Win - Safely dual boot Windows and Linux without touching the Windows MBR.
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.
EasyUEFI - Manage EFI/UEFI Boot Options & Manage EFI System Partitions & Fix EFI/UEFI Boot Issues
U-Boot - Das U-Boot (the Universal Bootloader) and Embedded Linux
PLoP Boot Manager - The PLoP Boot Manager is a small program to boot different operating systems.