OK – If I had screen shots I probably would not be posting!
I found it – it is part of the C/C++ development tools that you can add. It creates a new “Run Configuration…” that allows you to group multiple executables (e.g. java or c/cxx mains) into a single launcher. This is handy if you are not working within a container and need to launch multiple main routines.
I forgot I had installed the c/c++ plugins and assumed it was part of my-eclipse. Nope:
http://wiki.eclipse.org/CDT/User/NewIn60#Debug_and_Launch
Hope this helps someone else.