PostScript
Stack based page description language developed by Adobe in the mid 80's and based on a language called "Interpress" that was originally developed at Xerox. Inspired by GEM3 the Adobe company developed a version of PostScript that could be used to both describe printed pages and to control computer displays, called simply Display PostScript but the only customer for that was NeXT and they quietly dropped that version around 1990 due to lack of sales.
OS/2 text & programmers editors with PostScript support
- jEdit - Java based editor - PostScript syntax highlighting built in - Current.