Hey, sudorossy here.
Wrote my first bit of code with libgdx 4 years ago last Wednesday, so definitely have to enter!
I'll be using IntelliJ idea, I use it for my full-time job (webdev), but haven't had much of a chance to use it with Java yet.
Recently I've been working in Unity3D because I found it faster to prototype in, but I've been wanting to get back into libgdx, so a perfect excuse to try!
I'm trying to get better at art, so will be doing that. Photoshop/Paint.net as my main tools there.
Sound stuff will be Logic and my lovely 88-key MIDI keyboard.
Best of luck to all the other entries!