How about a Game Development community category?
Could you please consider a game development category? i.e. https://www.java.net//community/game-development.
There are some fairly high profile and very active game development projects based on Java that are well worth promoting. For Android LibGDX is gaining huge popularity, jMonkeyEngine (my project) is big on 3D and desktop, Slick2D is a great 2D framework, Alice and Greenfoot are popular in education and LWJGL and JOGL provide the OpenGL bindings for almost all of the above.
Games are huge, and unbeknownst to many people, Java is a great platform for game development. It would really help the Java for games movement if a site like Java.net could come to acknowledge that.