Objectworks

Objectworks is a cross-platform Smalltalk development system originally introduced in 1988 by ParcPlace Systems.

It came in two different versions that supported Smalltalk and C++ on DOS, Apple Macintosh and sundry UNIX systems.

The product was renamed to VisualWorks in the early 1990's thereafter due to a name clash, gained an OS/2 port and the C++ version was dropped.