First time
I am in.
Tools:
Concept: Pen, paper
Framework: cocos2d
Graphics: Gimp, Pixen
Sound: cfxr
Other: vim, git
I am in.
Tools:
Concept: Pen, paper
Framework: cocos2d
Graphics: Gimp, Pixen
Sound: cfxr
Other: vim, git
Hei,
this is my second time. Hopefully I will make a better and more accessible game, than my first.
Good luck everyone 
Library: webgl
Editors: Gimp, vim
Sound: Fl studio or Garageband
Other: git
This will be my third Ludum Dare compo entry.
Language: Javascript
IDE: Vim + Chromium console
Graphics: Gimp
Libraries: SoundManager 2, WebGL
Sound: SFXR, MilkyTracker

Edited to: Update library choices, and add precode to github repository.
I will be making a game with some folks at our local hackerspace in Oslo. Cheers 
Tools / libraries:
Photoshop
Maya
vim
glew, SDL2, and some prior precode available at https://github.com/scanf/SDLhelloworld