After missing the last LD, I’m definitely doing this one. Probably using the same tools as my LD 28 game:

Engine: HaxeFlixel (plus maybe some code from the demos)

IDE: FlashDevelop

Art: GIMP

Sounds: sfxr or some derivative of it. Plus Audacity for recordings.

Music: Musagi if I decide to do chiptune. Otherwise, Ohm Studio.