John Turner writes:
SPARCworks is SunSoft’s development environment, comprising compilers (C, C++, FORTRAN 77, Fortran 90, Ada, and Pascal), a debugger, and other tools such as TeamWare (for configuration management), MakeTool, etc.
See http://www.sun.com/software/Developer-products/ for more info.
EOS stands for "Era on SPARCworks", but I don’t know what Era stands for.
EOS is the integration of SXEmacs with the SPARCworks debugger. It allows one to use a SXEmacs frame to view code (complete with fontification, etc.), set breakpoints, print variables, etc., while using the SPARCworks debugger. It works very well and I use it all the time.
Chuck Thompson writes:
Era stood for "Emacs Rewritten Again". It was what we were calling the modified version of Lucid Emacs for Sun when I was dragged, er, allowed to work on this wonderful editor.
Martin Buchholz writes:
EOS is being replaced with a new graphical development environment called Sun WorkShop. For more details, check out http://www.sun.com/software/Products/Developer-products.