I’m in for both weekends
So I’ve participated before, but I’ve failed pretty much every single time.
This has been since 2010 for me, but I’ve become a much better programmer in the past year or so.
I’ll be doing the warmup weekend as well as the actual Ludum Dare because I want to actually have something to show for this time around, and I believe the practice will certainly help.
Library: Lua/Löve
Utilities: Git, Pen & Paper for planning
Sounds: I’m not sure yet
Graphics: Probably GIMP, unless anyone has a suggestion for a good Linux sprite editor?
Beverage: Tea mostly. 
Good luck everyone! I should have an update when I get some progress done on my warmup game….
It might last until Monday as of course I have summer homework and things to do. ARGH!