Top Bootstrap frontend and backend templates
Introduction
Fully featured and custom admin themes buile using bootstrap 4, HTML, CSS and JavsScript, provide you a range of responsive, reusable, and commonly used components.
AdminLTE (free)
Download: adminlte.io
Minton - Bootstrap Admin + Frontend (free/paid)
Download: coderthemes.com/wb/minton/bundle.html
INSPINIA - Responsive Admin Theme (paid)
Download: https://wrapbootstrap.com/theme/inspinia-responsive-admin-template-WB0R5L90S
Conclusion
You now have a stunning Bootstrap template for your website.