BsMultiselect is "multiselect input" plugin that reuses your Bootstrap 4 theme and doesn't bring its own css (unless you would like to add it).
Ecommerce Template - Bootstrap 4 & Material Design. ATTENTION! New templates for the latest Bootstrap 5 are now also available. Access new free templates via the link below.
Halfmoon is a highly customizable, drop-in Bootstrap replacement. It comes with three built-in core themes, with dark mode support for all themes and components.
An ASP.NET Core 6.0 IdentityServer4 Identity Bootstrap 4 template with localization