They were not open source. They were essentially NeXT’s only successful product. https://en.wikipedia.org/wiki/WebObjects https://en.wikipedia.org/wiki/WebObjec

They were not open source. They were essentially NeXT’s only successful product. https://en.wikipedia.org/wiki/WebObjects https://en.wikipedia.org/wiki/WebObjects WebObjects was rewritten from ObjC to Java in the 2000s. EOF, the ORM layer it shared with NeXTSTEP/OPENSTEP, was rewritten as Core Data and released in Mac OS X Tiger.