Grub Customizer is described as 'Graphical interface to configure the GRUB2/BURG settings and menuentries' and is a Boot Manager in the os & utilities category. There are more than 10 alternatives to Grub Customizer for Windows, Linux and Mac. The best Grub Customizer alternative is EasyBCD. It's not free, so if you're looking for a free alternative, you could try EasyBCD or EasyUEFI. Other great apps like Grub Customizer are Grub2Win, iReboot, GRUB4DOS and WINGRUB and rEFIt.
Written in C++ and licensed under GNU GPL, XOSL (eXtended Operating System Loader) is a user-friendly, window-based graphical boot manager handling large disks and over 30 different operating systems.
Yaboot is a PowerPC bootloader for Open Firmware based machines including New World Apple Macintosh, IBM RS/6000, IBM pSeries and IBM OpenPower machines.
