jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
DevExpress XPO - Free-of-Charge (without Technical Support), also see GitHub and Benchmarks.
Telosys - Telosys is a lightweight Open Source code generator. Telosys allows to generate any kind of language (Java, Python, GoLang, PHP, JavaScript, TypeScript, C#, etc). It works without UML model. All the code generation templates are customizable.
Hibernate ORM - Hibernate team account. Hibernate is a suite of open source projects around domain models. The flagship project is Hibernate ORM, the Object Relational Mapper.
PHP Generator for MySQL - PHP Generator for MySQL is a PHP code generator for rapid web application development.
Entity Framework - See Comparison of Entity Framework vs NHibernate.