A graphical editor for abc files with syntax highlighting and automatic invocation of abctab2ps and other third party software (like ghostview) is available as flabc from the abctab2ps homepage.
If you do not like to edit plain text files for the abc input but prefer some GUI stuff, you can try Jean F. Moine's tclabc. As it based upon Tcl/Tk, it runs on almost every platform. However, tclabc only supports music, no tablature.
In order to print postscript files on a non postscript printer, you need ghostscript. Ghostcript can not only convert postscript into almost all printer languages, it even can produce output formats which may be viewed on the screen. This capability is utilised by the online previewers ghostview and gv (same as ghostview, but more polished GUI).
There is a number of PS-utilities for manipulating postscript files. Useful are psselect (for extracting particular pages, e.g. all odd or even pages or pages 1 to 7), psresize (e.g. for converting EU A4 to US letter and vice versa) and psbook (reorders pages for book printing).
WYSIWIG text processors generally do not allow direct import of plain postscript files. In order to display the image in their editor window, they need a particular version of encapsulated postscript named EPSI. EPSI contains a (low quality) bitmap used by the text processor for its online preview; on printing the original (high quality) postscript is used. The tool ps2epsi converts postscript to EPSI.