Gobliin Editor is in SH5, and only for certain files and tasks.
S3Ditor is some cool stuff. There are quite a few tutorials on the site here, some linked to from the skwasjer's site, and it the best thing to use for SH4 stuff. It can open the DAT, SIM, ZON, VAL, CAM & DSD files of the game. However - for some of the work you'd need a 3D rendering program, such as
Blender or similar. While I have done some editing in S3Ditor, most of that is above my pay grade and ~way~ above my skill level...
