SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
EasyUEFI
EasyBCD
GRUB
Grub2Win
PLoP Boot Manager
Libreboot
Grub Customizer
BootIt Bare Metal
SourceForge
EasyUEFIEasyUEFI is recommended for users who need to manage multiple operating systems and configure boot options on UEFI-supported machines. It is especially beneficial for IT professionals, system administrators, and advanced users who frequently deal with boot issues or need to perform complex boot management tasks.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
EasyBCD - EasyBCD is NeoSmart Technologies multiple award-winning answer to tweaking Windows bootloader.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
GRUB - Multiboot boot loader
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Grub2Win - Safely dual boot Windows and Linux without touching the Windows MBR.