I will participate for the first on Ludum Dare (as long as I don’t forget what day it is, like the last time I planned on participating).
My text editor is Emacs, and I will use GIMP for the graphics.
I am not yet sure if I will use C++&SDL, Vala&SDL or Lua&LÖVE to make the game. It will depend on what my idea is. Either way, it will be cross-platform game, since I use Linux and I love cross-platform software.