Now UI Kit - A beautiful Bootstrap 4 UI kit. Yours free.
Material Dashboard - A free bootstrap admin built on top of Material Kit
Dashboard UI Kit - A modern & responsive dashboard UI kit for designers.
Quickmetrics - Here you'll find some handy helpers to send events to Quickmetrics. - Quickmetrics
Landing UI Kit - Handcrafted UI components for landing pages
Shards UI Kit - A free and modern UI kit based on Bootstrap 4.