OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.
Grails - An Open Source, full stack, web application framework for the JVM
Open As App - Automatically create a business app from a spreadsheet, no coding.