If I managed to participate here’s my tools :

Language : As3 / C#
Engine : Flashpunk / A little library I wrote myself*.
Art : Flash or Aseprite
Sound : Sfxr
Music : Fruity Loops or Bosca Ceoil

*I plan on livestreaming on twitch this Saturday to reveal the library. It’s all pretty funky.

Hope everyone has a great time participating!