Floyd Marinescu writes: InfoQ.com reports that Oracle is contributing TopLink (one of the first production object persistence engines first launched in 1994), to Eclipse as an open source project. Oracle is proposing that TopLink become the The Eclipse Persistence Platform (tentatively named EclipseLink). Going forward, all production features of TopLink will be available in EclipseLink and Oracle's commercially supported TopLink will only contain an additional thin proprietary integration code layer necessary for some Oracle AppServer and SOA Suite features. TopLink is the last major production Java ORM/persistence engine to go open source. BEA's Kodo engine is also being built off of their contribution of Kodo to the Apache OpenJPA project. Hibernate now has two open source competitors, each with signficant install bases and years of commercial investment.