Eero was a fully binary- and header-compatible dialect of Objective-C, implemented with a modified version of the Apple-sponsored LLVM/clang open-source compiler. It featured a streamlined syntax, Python-like indentation, and other features that improve readability and code safety. It was inspired by languages such as Smalltalk, Python, and Ruby.
The Eero Xcode plugin is now distributed via Alcatraz. This also provides a plugin update mechanism.