On it!
Well, my third Ludum, forth Jam.
I’m planning to use
Audio:
Probably, LMMS Studio, but not sure.
Engine:
Depends, many options, Blender, Unity3D or Gamesalad.
Art:
Gimp
Mypaint and Krita maybe
3D:
Blender
Maybe more some programs and resources for the sfx, if I use something else, I’ll list it.
As I always do, the development can be followed at http://fred3erick.tumblr.com/