What is flixel-gdx?
flixel-gdx is an open source 2D game engine written in Java. Flixel-gdx is a port of AS3 flixel written by Adam ‘Atomic’ Saltsman to the Java language. It is built on top of the powerful libgdx framework which allows developers to build and distribute cross-platform games. The complex stuff like OpenGL ES is taken care by libgdx and flixel-gdx makes you creating games easy and fun.
flixel-gdx doesn't have its own message board, but you can use the forums of flixel and libgdx. Both have an active community. If you have any questions or feedback that are related to flixel please put it in the flixel community. They are more likely to help you out more quickly than at the libgdx. Questions about Android, OpenGL ES, rendering, etc. goes to libgdx.
flixel-gdx is distributed under the New BSD License, meaning you can use it free of charge, without strings attached in commercial and non-commercial projects. We love to get (non-mandatory) credit in case you release a game or app using flixel-gdx!