Can you name alternative implementations of JPA other than Hibernate?

Besides Hibernate, there are other implementations of the JPA specification:

• EclipseLink — the official reference implementation of JPA from the Eclipse Foundation, supporting advanced features and well integrated with GlassFish.
• OpenJPA — an Apache project, offering an alternative to Hibernate with its own optimizations.
• DataNucleus — supports JPA and other specifications, capable of working with various types of databases and repositories.

All of them implement the JPA standard but differ in performance, supported features, and integration.