OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.

10Duke SDK - A rapid application development kit for creating new online applications. Dramatically reduce development times from months to weeks.

jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.

Invantive Studio - Powerful software development environment

Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.

MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.