OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
DataGrip - Tool for SQL and databases
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.