BonVue Admin Template is a popular open source WebApp template for admin dashboards and control admin panels. BonVue is a fully responsive HTML template, based on the CSS framework Bootstrap. It utilizes all of the Bootstrap components in its design and re-styles many commonly used plugins to create a consistent design that can be used as a user interface for backend applications.

Demo: https://themeforest.net/item/bonvue-the-ultimate-bootstrap-4-admin-template-ui-kit/20889223