SafeBox is intended to be a next-generation debugger/profiler/analyzer for programs running in user space. It will include arquitecture simulation to allow advanced features like monitoring or restricting API use. Extensible using plug-ins.
A cross-platform wxWindows class for running Ghostscript and manipulating the image it produces, plus an IDE/debugger for developing programs written in PostScript.
For a PostScript debugger, there is now also an Eclipse plug-in - see http://thomas-fritsch.github.io/psdt/