about "bfxr" program:
bfxr is a sound generator that can generate different sounds depending upon the condition. Just by tweaking some values sounds can be generated.
about "save game free" by bayatgames asset store in unity:
it is a replacement for player prefs and I have been using it on a daily basis. It is almost like player prefs but can store all kinds of data like Vector3 and all.
I believe that these would only make workflow easier but being the first game jam i'm participating in I'm not sure.