Jet Admin - Build business apps really fast
Tabler - Admin panel made simple
Retool - Build custom internal tools in minutes.
CodeQuest - Mini-games that intro kids to HTML and web development
MissionKontrol - A self-hosted admin panel and interface that allows you to manage your apps' data.
Appsmith - Appsmith is an open source web framework for building internal tools, admin panels, dashboards, and workflows.