Grub2Win is an open-source, dual-boot loader for Windows and Linux. It allows users to easily switch between operating systems by selecting the desired OS at boot time. Grub2Win is based on the popular GRUB2 boot loader, and provides a graphical user interface that makes it easy to configure and customize the boot menu. It also provides a convenient way to boot from external storage devices, allowing users to take their favorite operating systems with them wherever they go. Grub2Win is free to use and is compatible with a wide range of operating systems, including Windows, Linux, and Mac OS X.
REFI discontinued. It has no longer been maintained since 2013. The author suggested visiting http://alternativeapp.info/software/refind/, a fork of the original program.