Like Yerk , Mops is descended from the ex-commercial object-oriented language Neon . It was developed by Michael Hore mikeh@kralizec.zeta.org.au . Mops features an optimising native -code compiler; it is much faster than Yerk, but less compatible with Neon. Mops includes extensions such as multiple inheritance .
Version 2.3.1 includes a compiler, documentation and an editor.
A Macintosh version is available. ftp://oddjob.uchicago.edu/pub/Yerk .