So I was looking at GUI libraries and came across TWL which looked really interesting but wasn’t supported for LWJGL 3. So I started a project to bring TWL up to date. It still needs a lot of fixing but if anybody wants to look at it and give thoughts and opinions check out https://github.com/LacombeJ/TWL_LWJGL3
My original post on LWJGL forum: http://forum.lwjgl.org/index.php?topic=6150.0