A new version of GeeXLab is available for all platforms: Windows (32-bit, 64-bit), Linux (64-bit), Mac OS X and Raspberry Pi (Raspbian).
GeeXLab, the successor of GLSL Hacker, comes with the support of Direct3D 12. It’s not a full support but most of the basic things are available: command lists (CL), pipeline state objects (PSO), constant buffers (CB) and HLSL shaders.
The GLSL Hacker project is now officially stopped. To make a long story short, the support of Direct3D 12 as well as the upcoming support of Vulkan (when it will be available) are the main reasons that have led to a change of name.
Here is a collection of links I gleaned mostly on Twitter about coding, graphics programming and other stuff for developers.