I am in.

Using:

My old XNA utilities with MonoGame for Android / Xamarin (which now run on Windows/ Windows 10/ XboxOne/ Android).

BXFR for Sound Effects.

Paint.Net for Graphics.

(Usually no music :P)

To celebrate Xamarin going free, my entry will only be accessible from the Android Store for free download this time around, with a latest version being available every so often during the weekend.