Energy micro has wonderful demo/proto boards. But sometimes it is more useful to have bare module without any periphery. Jut fan-out-ed pins, power supply and oscillator. Pins should be 100mils raster in order to stick the module inside other protoboards.
Presented protoboard is the one, which fits in above requirements.
There is nothing special about this board itself. Here are schematic, assembly drawing and altium designer project files.
Feel free to use it and please post some feedback if you find it useful or make any interesting development with the help from this board.