Invision - Prototyping and collaboration for design teams
Jet Admin - Build business apps really fast
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Retool - Build custom internal tools in minutes.
Craftwork - A collection of User Interface resources made by Craftwork
Appsmith - Appsmith is an open source web framework for building internal tools, admin panels, dashboards, and workflows.