Most likely Unity3d, as I will be working with a crowd of Unity programmers.
If not, I’ve been recently messing about with roguelikes, which if I do that, it would be using C and ncurses.
If not that, it’ll probably be some iphone game.
Graphics will likely be done in Gimp. I have cfxr still working on my computer, so probably that. Also, I want to play with this