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/
html-ebook is intended to be a simple html browser that displays pages in a paginated fashion instead of scrolling display.
e-book features will be implemented.