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OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
Sesame Database Manager - Lantica Software, LLC - Sesame, A Q&A-compatible Database Manager.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
Sheep - Membership and events for SMEs and nonprofits
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.