I will be participating in Ludum Dare #30! I will very likely be using my own very, very simple HTML5 Canvas framework. It’s really just a bunch of functions that make objects so I don’t have to type as much. Here it is, if for some reason you feel like trying it out. It doesn’t work extremely well, but it speeds things up for me. As for software, here’s what I use:
Sublime Text 2 – Code editor
GIMP – Graphics editor
Audacity – Audio editor, in the event that I need one
Lastly, I will be using Github to host the sourcecode.