The Green Brain project wants to create an artificial Apis mellifera brain and implement said brain into a robot, that will be able to fly and and behave just like a honey bee!
NeuroTinker project is all about hardware emulated neurons. The creators made them in a way that each hardware neuron has excitatory and inhibitory inputs and one output that can be split up to affect dowsntream neurons.
Big Neuron wants to create a standard for the field of single neuron reconstruction. Because the data available comes from different structures, different organisms, using different collection and analyses algorithms and is in the range of petabytes (according to the project site), there is a strong need for standards that will allow this huge amount of data to be compared.