Just spend a little time to learn hacking and you won't need game specific programs. With a little investigation, I can turn atlas and romjuice into a text editor for any game.
-Mostly- any game. I find myself writing custom script insertion tools in a few cases where Atlas is lacking. The categories would be:
A. Games that use compression (it's a pain to rebuild them...)
B. PSX games, just because I can't integrate Atlas into my own file rebuilding code, which makes things cumbersome
C. Games that use tree-like structures for their text routines. Any game of the latter sort will require a lot of Atlas commands to rebuild, so I prefer to write a custom inserter to clean up the script.