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

Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

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

DownToMeet - DownToMeet is a platform to organize, find, and attend group events.

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

Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.